WorksheetsKiến thức về Nguyên tố Hóa học
Total questions: 68
Worksheet time: 34mins
What is the primary focus of the knowledge objective in the lesson "Nguyên tố hóa học"?
To memorize the periodic table
To state the concept of chemical elements and their symbols
To conduct chemical experiments
To learn about chemical reactions
Which skill is emphasized under "Năng lực chung" in the lesson?
Memorizing chemical formulas
Actively and independently understanding the concept of chemical elements
Writing chemical equations
Conducting laboratory experiments
What is one of the tasks under "Năng lực khoa học tự nhiên" in the lesson?
Writing chemical equations for reactions
Listing the names and symbols of some chemical elements
Conducting group experiments
Memorizing the atomic weights of elements
What is the expected outcome of the activity "Giao tiếp và hợp tác" in the lesson?
To memorize the periodic table
To use scientific language effectively in group discussions
To conduct experiments in a group
To write chemical equations
What is one of the characteristics students should demonstrate during group activities?
Being passive and quiet
Actively participating in group activities suitable to their abilities
Ignoring the group's needs
Focusing only on individual tasks
What is one of the teacher's responsibilities in preparing teaching materials for the lesson?
Writing a new textbook
Preparing cards to identify chemical elements based on the number of protons
Avoiding the use of visual aids
Asking students to memorize the periodic table without explanation
What is one of the tasks students should complete before the lesson?
Memorizing all chemical elements
Reading the lesson in the textbook in advance
Preparing a presentation on chemical reactions
Writing a report on the periodic table
What is the goal of the teacher's introductory activity in the lesson?
To test students' memorization skills
To guide students and help them approach the topic of the lesson
To assign homework for the next class
To conduct a quiz on previous lessons
Which of the following is an example of a substance commonly found in daily life?
Salt
Plastic
Paper
Wood
What is a substance that is made up of one or more chemical elements?
A mixture
A compound
A solution
A suspension
Which of the following is NOT a chemical element mentioned in the text?
Oxygen
Carbon
Hydrogen
Plastic
What is the purpose of the teacher asking students to name substances they know in daily life?
To test their memory
To introduce the concept of chemical substances
To evaluate their drawing skills
To teach them about mixtures
Which of the following is an example of a chemical element?
Gold
Sugar
Water
Salt
What is the defining characteristic of a chemical element?
It has a specific shape and size.
It is defined by the number of protons in its nucleus.
It is made up of multiple types of atoms.
It changes its properties based on temperature.
Which of the following is true about a sample of lead (Pb)?
Each atom contains 79 protons in its nucleus.
Each atom contains 82 protons in its nucleus.
Each atom contains 79 neutrons in its nucleus.
Each atom contains 82 neutrons in its nucleus.
What is the definition of a chemical element?
A substance made up of atoms with the same number of protons.
A substance with a specific shape and size.
A mixture of different types of atoms.
A compound formed by combining two or more substances.
Which of the following is NOT a characteristic of a chemical element?
It has no specific shape or size.
It has unique properties determined by the number of protons.
It is made up of atoms with different numbers of protons.
It is defined by its atomic number.
What is the atomic number of a gold (Au) atom?
79
82
78
80
What does the atomic number of an element represent?
The number of neutrons in the nucleus.
The number of protons in the nucleus.
The total number of protons and neutrons.
The number of electrons in the outer shell.
What is the atomic number of an element?
The number of neutrons in the nucleus
The number of protons in the nucleus
The total number of protons and neutrons
The number of electrons in the outer shell
What is a characteristic of elements belonging to the same chemical element?
They have the same number of neutrons
They have the same atomic number
They have the same mass number
They have the same physical state
Which of the following is an example of isotopes of oxygen?
Oxygen atoms with 8 protons and 8 neutrons
Oxygen atoms with 8 protons and 9 neutrons
Oxygen atoms with 8 protons and 10 neutrons
All of the above
How many chemical elements have been discovered so far?
100
108
118
128
How can chemical elements be identified?
By their mass number
By their number of neutrons
By their number of protons
By their physical state
What determines whether atoms belong to the same chemical element?
The number of neutrons in the nucleus
The number of protons in the nucleus
The total number of protons and neutrons in the nucleus
The number of electrons in the atom
Why do isotopes of the same element, such as hydrogen, belong to the same chemical element despite having different numbers of neutrons?
Because they have the same number of protons
Because they have the same number of neutrons
Because they have the same atomic mass
Because they have the same number of electrons
What is the atomic number of oxygen, and how many protons does an oxygen atom have in its nucleus?
Atomic number 6, with 6 protons
Atomic number 7, with 7 protons
Atomic number 8, with 8 protons
Atomic number 9, with 9 protons
What is the primary method to identify a chemical element according to the text?
By its atomic mass
By its number of protons
By its chemical symbol
By its position in the periodic table
What is one of the objectives of the activity related to chemical elements?
To memorize the atomic mass of all elements
To understand the history of the periodic table
To know the names and symbols of 20 chemical elements
To learn how to create a new chemical element
What is the purpose of the teacher's guidance during the activity?
To provide answers to the students
To monitor, guide, and support students if needed
To evaluate students' final reports
To assign grades for the activity
What is the expected outcome of the activity on chemical elements?
Students will memorize the entire periodic table
Students will write down the names and symbols of 20 chemical elements
Students will create a new periodic table
Students will learn the atomic structure of all elements
What is the role of students during the discussion phase of the activity?
To listen to the teacher's lecture
To present their understanding of chemical elements and receive feedback
To memorize the periodic table
To conduct experiments on chemical reactions
What is the most widely accepted system for naming chemical elements globally?
International Union of Pure and Applied Chemistry (IUPAC) system
Ancient Greek naming system
Roman numeral system
Alchemical symbols system
Which of the following elements was known since ancient times?
Gold (Au)
Rutherfordium (Rf)
Bohrium (Bh)
Livermorium (Lv)
What is the origin of the name for the element copper (Cu)?
From the Latin word "Cuprum," referring to the island of Cyprus
From the Greek word "Kypros," meaning metal
From the Roman word "Cuper," meaning shiny
From the ancient Egyptian word "Kupros," meaning valuable
What does the Latin origin of the name for aluminum (Al) mean?
"Alumen," meaning "bitter salt"
"Alumen," meaning "shining metal"
"Alumen," meaning "sacred stone"
"Alumen," meaning "sinh ra phèn" (to produce alum)
Which of the following is an example of a chemical element discovered in recent times?
Bohrium (Bh)
Silver (Ag)
Iron (Fe)
Mercury (Hg)
What is the chemical symbol for the element hydrogen?
H
He
Li
O
Which of the following is the correct atomic number for oxygen?
6
7
8
9
What is the atomic mass (amu) of carbon?
11
12
14
16
Which of the following elements has the chemical symbol "Na"?
Neon
Sodium
Nitrogen
Potassium
What is the chemical symbol for the element with the Latin name "kalium"?
K
Ca
Na
Mg
How many letters are typically used in the chemical symbol of an element?
One or two
Two or three
Three or four
Only one
Which of the following is NOT true about chemical symbols?
They are standardized worldwide.
They are derived from the element's name.
They always consist of three letters.
The first letter is always capitalized.
What is the atomic number of the element with the chemical symbol "Be"?
2
4
6
8
Which of the following objects is most likely to contain a chemical element?
A plastic bag
A milk carton
A piece of paper
A rubber band
What is the chemical symbol for aluminum, and what are some of its applications?
Al; used in making wires, construction materials, and airplanes
Fe; used in making wires, construction materials, and airplanes
Cu; used in making wires, construction materials, and airplanes
H; used in making wires, construction materials, and airplanes
Which of the following elements has a chemical symbol consisting of only one letter?
Hydrogen (H), Boron (B), Carbon (C)
Aluminum (Al), Copper (Cu), Iron (Fe)
Oxygen (O), Sulfur (S), Phosphorus (P)
Both A and C
What is the chemical symbol for iron, and what are some of its uses?
Fe; used in construction, automobile manufacturing, and household items
Cu; used in construction, automobile manufacturing, and household items
Al; used in construction, automobile manufacturing, and household items
H; used in construction, automobile manufacturing, and household items
Which of the following is true about chemical symbols?
They consist of one or two letters, with the first letter always capitalized.
They consist of three letters, with the first letter always capitalized.
They consist of one or two letters, with both letters always capitalized.
They consist of one or two letters, with both letters always lowercase.
Which of the following elements is commonly found in the composition of air?
Nitrogen (N)
Aluminum (Al)
Copper (Cu)
Iron (Fe)
What is the chemical symbol for sodium?
Na
S
K
Si
Which of the following elements has a chemical symbol that does not originate from its IUPAC name?
Helium (He)
Sodium (Na)
Neon (Ne)
Argon (Ar)
Which of the following is NOT a component of the Earth's atmosphere?
Oxygen
Nitrogen
Carbon
Magnesium
What is the chemical symbol for potassium?
P
K
Po
Pt
Which of the following elements has a two-letter chemical symbol?
Helium
Carbon
Neon
Sodium
What is the correct definition of a chemical element?
A compound.
A mixture.
Atoms of the same chemical element.
A chemical element.
Which of the following is the correct symbol for the element magnesium?
MG.
Mg.
mg.
mG.
As of now, how many chemical elements have been discovered?
118.
94.
20.
1,000,000.
Why do gold and carbon have different properties?
Because gold is a non-metal while carbon is a metal.
Because gold is an element while carbon is a compound.
Because gold is a metal while carbon is a non-metal.
Because gold is rare while carbon is common.
How many protons does a sodium (Na) atom have in its nucleus?
23.
11.
32.
20.
How many protons and neutrons are present in the nucleus of a Neon atom with a mass of 22 amu?
10 protons and 12 neutrons
12 protons and 10 neutrons
11 protons and 11 neutrons
10 protons and 10 neutrons
Why do two types of Neon atoms belong to the same chemical element?
Because they have the same number of neutrons
Because they have the same number of protons in the nucleus
Because they have the same atomic mass
Because they have the same number of electrons
Which of the following elements are present in the air?
Nitrogen, oxygen, carbon, argon, hydrogen
Hydrogen, oxygen, sodium, chlorine
Carbon, sulfur, iodine, potassium
Phosphorus, iron, iodine, argon
Which of the following elements are found in seawater?
Hydrogen, oxygen, sodium, chlorine
Nitrogen, oxygen, carbon, argon, hydrogen
Carbon, sulfur, iodine, potassium
Phosphorus, iron, iodine, argon
Which four chemical elements make up the largest percentage of the human body by mass?
Hydrogen, oxygen, carbon, nitrogen
Hydrogen, oxygen, sodium, chlorine
Carbon, sulfur, iodine, potassium
Phosphorus, iron, iodine, argon
Which four chemical elements make up the largest percentage of the human body by mass?
Carbon, oxygen, hydrogen, nitrogen
Carbon, oxygen, sulfur, phosphorus
Hydrogen, nitrogen, calcium, potassium
Oxygen, nitrogen, magnesium, sodium
What is the next topic to be studied after this lesson, as mentioned in the learning material?
Overview of the periodic table of chemical elements
Chemical reactions and their types
Properties of metals and non-metals
Atomic structure and bonding
