WorksheetsREVIEW FOR Q1 GC1
Total questions: 64
Worksheet time: 31mins
Which of the following best defines matter?
Anything that has energy and occupies space.
Anything that possesses mass and occupies space.
Anything that can be seen and touched.
Anything that undergoes chemical changes.
What percentage of the universe's total composition is estimated to be visible matter?
Approximately 95%
Approximately 50%
Approximately 5%
Approximately 1%
Which of the following is an example of a physical property?
Flammability
Reactivity
Melting point
Corrosivity
Which of the following is an example of a chemical property?
Density
Boiling point
Hardness
Oxidation
A property that depends on the amount of matter present in a sample is called:
Intensive property
Extensive property
Chemical property
Physical property
Which of the following is an intensive property?
Mass
Volume
Temperature
Total energy
What type of change occurs when ice melts into liquid water?
Chemical change
Nuclear change
Physical change
Irreversible change
Burning wood is an example of what type of change?
Physical change
Chemical change
Phase transition
Extensive change
Which state of matter has a definite shape and volume?
Liquid
Gas
Plasma
Solid
Which state of matter expands to fill any container and is highly compressible?
Solid
Liquid
Gas
Bose-Einstein Condensate
What is the definition of 'measurement' according to Britannica?
The act of comparing two quantities.
The process of associating numbers with physical quantities and phenomena.
The determination of an object's size.
The use of instruments to quantify observations.
How is 'accuracy' defined in the context of measurements?
How close measurements of the same item are to each other.
The fact of being exact or correct.
The number of significant figures in a measurement.
The difference between a measured value and the true value.
What does 'precision' refer to in measurements?
The fact of being exact or correct.
How close measurements of the same item are to each other.
The absence of errors in measurement.
The ability to measure very small quantities.
What do significant figures (Sig Fig) indicate?
The magnitude of a number.
The precision of a number, particularly in measurements.
The number of decimal places.
The absolute error in a measurement.
Which of the following is a fundamental quantity?
Area
Volume
Mass
Speed
Which of the following is a derived quantity?
Length
Time
Temperature
Force
In the CGS system of units, what are the fundamental units for length, mass, and time?
Meter, kilogram, second
Foot, pound, second
Centimeter, gram, second
Inch, ounce, minute
What is the SI unit for length?
Centimeter
Foot
Meter
Kilometer
What is the SI unit for mass?
Gram
Pound
Kilogram
Ounce
Which of the following is a supplementary unit in the SI system used to measure plane angle?
Steradian
Radian
Degree
Arcsecond
According to SI unit rules, if a unit is named after a person, how should its full name be written?
Always starts with a capital letter.
Always starts with a small letter.
It depends on the context.
It can be capitalized or not.
How should the symbol for a unit named after a scientist be written?
In small letters.
In capital letters.
It depends on the number of letters.
With a subscript.
How many significant figures are in the number 0.00520?
2
3
4
5
How many significant figures are in the number 200.0?
1
2
3
4
What does the Law of Conservation of Matter state?
Matter can be created but not destroyed.
Matter can be destroyed but not created.
Matter cannot be created or destroyed, only changed in form.
Matter is always conserved in open systems.
The Law of Definite Proportion states that a given chemical compound always contains the same elements in the same proportion by:
Volume
Mass
Number of atoms
Density
If two elements combine to form more than one compound, the masses of one element that combine with a fixed mass of the other element are in a ratio of small whole numbers. This is known as:
Law of Conservation of Mass
Law of Definite Proportion
Law of Multiple Proportion
Dalton's Atomic Theory
According to Dalton's Atomic Theory, all matter is composed of:
Molecules
Ions
Atoms
Elements
What is the mass number of an atom?
The number of protons.
The number of neutrons.
The total count of protons and neutrons.
The number of electrons.
Atoms of the same element that contain equal numbers of protons but different numbers of neutrons are called:
Ions
Molecules
Isotopes
Allotropes
What is a molecule?
A single atom with a net electric charge.
A group of atoms bonded together, representing the smallest fundamental unit of a chemical compound.
A substance that cannot be broken down into simpler parts.
A mixture of two or more elements.
What is an ion?
A neutral atom.
An atom or molecule that has gained or lost electrons, resulting in a net electrical charge.
A group of atoms bonded together without a charge.
A subatomic particle.
Which type of ion is a single atom that has acquired an electrical charge?
Polyatomic ion
Diatomic ion
Monoatomic ion
Complex ion
Which of the following is an example of a polyatomic ion?
Na+
Cl-
SO4^2-
O^2-
What does a molecular formula provide?
The simplest whole-number ratio of atoms.
The exact number of atoms of each element present in a single molecule.
The arrangement of atoms and bonds.
The relative proportions of elements.
What does an empirical formula represent?
The exact number of atoms of each element.
The simplest whole-number ratio of atoms in a compound.
The spatial organization of atoms.
The total mass of the compound.
What is a ternary compound characterized by?
Containing two different elements.
Containing three different elements.
Containing only polyatomic ions.
Containing only metallic elements.
How are ternary compounds typically named?
By naming the anion first, followed by the cation.
By naming the cation first, followed by the name of the polyatomic anion.
By using prefixes to indicate the number of atoms.
By adding '-ide' to the end of the element names.
What is an atomic mass unit (amu) defined as?
The mass of a single proton.
The mass of a single neutron.
1/12 the mass of an individual carbon-12 atom.
The average mass of all isotopes of an element.
What does the average atomic mass of an element represent?
The mass of its most abundant isotope.
The sum of protons and neutrons in its nucleus.
The weighted average of the masses of all its naturally occurring isotopes.
The mass of a single atom of that element.
How is molecular mass calculated?
By subtracting the atomic masses of all atoms present.
By multiplying the atomic masses of all atoms present.
By summing the atomic masses of all the atoms present in the molecule.
By dividing the total mass by the number of atoms.
For which type of compounds is 'formula mass' more accurately used?
Covalent compounds
Ionic compounds
Organic compounds
Elemental substances
What is Avogadro's number approximately equal to?
1.0 times 10^23
6.022 times 10^23
3.14 times 10^23
12.0 times 10^23
What is a mole defined as?
The mass of an atom in grams.
The amount of substance that contains exactly 6.02214076 times 10^23 elementary entities.
The volume occupied by one gram of a substance.
The number of protons in an atom.
If Carbon-12 has a mass of exactly 12 amu, and the atomic mass of Cu-63 is 62.93 amu, how many times heavier is one atom of Cu-63 relative to a C-12 atom?
12 times
5.244 times
62.93 times
0.19 times
Why is the relative atomic mass of carbon given as 12.01 amu and not 12 amu?
Because of experimental error.
Because it accounts for the different isotopes of carbon and their relative abundances.
Because carbon atoms are not perfectly spherical.
Because of the mass of electrons.
What are the subatomic particles?
Protons, Electrons, Neutrons
Molecules, and atoms
Electrons, Protons, Nucleus
Nucleus, and Electrons
What is this subatomic particle that has negative charge?
Electron
Neutron
Proton
Megatron
An ionic compound forms between a _______ and _______.
metal and non-metal
two metals
two non-metals
Name the ionic compound, LiCl
lithium chlorine
lithium chloride
lithium chlorate
lithium monochloride
Name the ionic compound, CaCO3
calcium carbide
calcium carbon trioxide
calcium carbon oxide
calcium carbonate
Name the compound Na2O
Sodium Oxide
Sodium Dioxide
Sodium Oxygen
Natride Oxide
If the atomic number of Pb (Lead) is 82 and its atomic mass is 205, how many neutrons does it have?
123
82
205
287
Hydrogen has an atomic mass of 3 and atomic number of 1. How many protons and neutrons does hydrogen have?
3 protons and 1 neutron
1 proton and 2 neutrons
2 protons and 1 neutron
1 proton and 3 neutrons
An atom has an atomic number of 11 and an atomic mass of 23. Which of the following statements is correct?
It has 11 protons and 11 neutrons.
It has 11 electrons and 12 protons.
It has 11 protons and 11 electrons.
It has 23 protons and 11 electrons.
What is the atomic mass of an atom with 32 protons and 31 neutrons?
31
32
62
63
Coal is used to produce electricity by burning them to power the generator.
intensive physical property
extensive physical property
chemical property
Water freezes at O degrees Celsius.
intensive physical property
extensive physical property
chemical property
Salt and refined sugar are both white in color.
intensive physical property
extensive physical property
chemical property
Which among the options below is the molecular formula for sugar which is used in cooking as sweetener?
H2O2
C12H22O11
C9H8O4
C2H6O
Which method uses the boiling point differences by gradually heated a mixture? The substance that vaporize the easiest will separate first.
decantation
distillation
filtration
mechanical separation
Which properties of matter can be observed and measured without changing the identity and composition of the substance ?
Extensive Properties
Intensive Properties
Chemical Properties
Physical Properties
What properties of chemical is refers to the ability of the substance to burn like wood, paper, and the like?
Flammability
Melleability
Reactivity
Sollubility
What law of matters states that the mass is conserved during a chemical reaction?
Law of Conservation
Law of Proportion
Law of define Composition
