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WorksheetsUnit 1 Review
Total questions: 33
Worksheet time: 42mins
An element has a metallic-grey appearance. It also has the properties of both a metal and a nonmetal. In which section of the periodic table indicated in the illustration would the element most likely be found?
1
2
3
4
A researcher wants to experiment with an element that reacts like phosphorus (P) but has a greater atomic mass. Which element should the researcher select for the experiment?
The model of the periodic table in the illustration shows the location of four elements. A student is asked to identify an element that is a pale yellow brittle solid that does not conduct electricity. At which location in this periodic table would the element most likely be found?
1
2
3
4
A student is studying the ways different elements are similar to one another. The illustration contains diagrams of atoms from four different elements. Which two atoms are of elements in the same group in the periodic table?
The periodic table is organized into groups and periods of elements. The characteristics of a certain group of elements are listed in the illustration. Which of these elements is in this group?
Lithium
Strontium
Aluminum
Silicon
Which two elements on the periodic table are in the same period?
Sn and Rb
F and Cl
K and Ba
Se and Te
Students were asked to identify the location of elements in the periodic table based on clues printed on game cards. Based on the data, which periodic table shows the correct location of the four elements?
Which pair of properties describes the elements in Group 18?
They are chemically stable and liquid at room temperature.
They have eight valence electrons and are flammable.
They are magnetic and boil at low temperatures.
They are gaseous at room temperature and chemically stable.
How many valence electrons are in an atom of each element in Group 15 in the periodic table?
5
10
15
20
Which table has the correct information about each element?
Which of the following best describes an electron?
It has no charge and about the same mass as a proton.
It has a negative charge and much less mass than a proton.
It has a positive charge and much more mass than a neutron.
It has a negative charge and about the same mass as a neutron.
An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?
+25
+30
-25
-30
A model of a beryllium atom is shown in the illustration. What type of particles are found in the cloud surroounding the atom's nucleus?
Positively charged particles and negatively charged particles
Negatively charged particles only
Neutral particles and postiviely charged particles
Positively charged particles only
An atom of a certain element has 36 protons and 36 electrons and a mass number of 84. At room temperature this element is a very stable gas. How many neutrons are in this atom?
36
84
48
72
Ernest Rutherford's led to the understanding that an atom consists mostly of empty space with __________.
protons orbiting a dense nucleus made of electrons and neutrons
electrons orbiting a dense nucles made of protons and neutrons
neutrons and protons orbiting a cloud electrons.
electrons and protons orbiting a cloud of neutrons
How many protons, neutrons, and electrons are present in an atom of Hafnium (Hf) with a mass number of 178?
72 protons, 178 neutrons, 106 electrons
72 protons, 106 neutrons, 72 electrons
178 protons, 250 neutrons, 72 electrons
106 protons, 72 neutrons, 106 electrons
Which statement accurately describes the atoms of a specific element?
An indium (In) atom contains 115 protons inside the nucleus and 49 neturons outside the nucleus.
A Scandium (Sc) atom contains 45 electrons outside the nucleus and 21 neutrons inside the nucleus.
An aluminum (Al) atom contains 27 electrons and 27 protons inside the nucleus.
A zinc (Zn) atom contains 30 protons inside the nucleus and 30 electrons outside the nucleus.
The model of an atom is shown in the illustration. An atom of which element is represented by this model?
Boron (B)
Carbon (C)
Neon (Ne)
Sodium (Na)
A student is studying Calcium (Ca), a highly reactive element that humans need for strong bones. Which characteristics of calcium is most closely related to its chemical reactivity?
The 20 protons in each atom of calcium
The density of calcium which is 1.54 g/cm3
The atomic mass of calcium which is 40.078 amu
The 2 valence electrons in each atom of calcium
The table lists three characteristics of an atom of an element. An atom of which element is described by the data in the table?
Radon (Rn)
Cadmium (Cd)
Rubidium (Rb)
Astatine (At)
The atoms of a certain element each contain 11 protons and 1 valence electron. Which statement correctly identifies this element and describes its chemical activity?
The element is sodium and it is highly reactive.
The element is fluorine and it is not very reactive
The element is sodium and it is not very reactive.
The element is fluorine and it is highly reactive
A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determine the element's identity?
The number of protons
The number of neutrons
The location of valence electrons
The number of valence electrons
Tin (Sn) is a soft white metal. It has a low melting point compared to other metals.Tin is widely used as a coating for cans of food. Which statement correctly describes the atoms of tin.
Tin atoms have 50 protons
Tin atoms have 5 valence electrons
Tin atoms have 119 neutrons
Tin atoms have 68 electrons
A chemist made the table to record some atomic properties of four elements. Based on the information in the table, which conclusion about the chemical reactivity of these elements is valid?
Boron is the most reactive because it has the most protons.
Fluorine is the most reactive because it has 7 electrons in its outer shell.
Silicon is the most reactive because it has an equal number of protons and neutrons.
Gallium is the most reactive because it has many more neutrons than protons.
A student drew atomic models of four elements. Based on these models which element is the least reactive?
Neon, because it has two energy levels with eight electrons in the second level.
Chlorine, because it has three energy levels with seven electrons in the third level.
Gallium, because it has four energy levels with three electrons in the fourth level.
Tin, because it has five energy levels with four electrons in the fifth level.
Which statement correctly describes the location and charge of the neutrons in an atom?
The neutrons are inside the nucleus and have a positive charge.
The neutrons are outside the nucleus and have a neutral charge.
The neutrons are outside the nucleus and have a negative charge.
The neutrons are inside the nucleus and have a neutral charge.
The atomic number will tell you the number of (a) located inside the (b) and the number of (c) orbiting the nucleus. An atom of Potassium would contain (d) protons, 19 electrons , and (e) neutrons.
Group 18
Noble Gases
Group 1
Alkali Metals
Group 2
Alkaline Earth Metals
Groups 3-12
Transition metals
Group 17
Halogens
Located in the nucleus; have a positive charge; and a mass of 1 amu
Protons
Located outside of the nucleus; have a negative charge; and a mass of 1/2000th of an amu
electrons
located in the nucleus; have no charge; and no charge
neutrons
