Periodic Table

1) The properties of the atoms depend on their

1. mass
2. number
3. radius
4. structure

2) When an atom gains or loses electrons, it tends to

1. become chemically unstable
2. become neutral
3. increase its oxidation number
4. change its size

3) Elements within a group have

1. similar number of valence electrons
2. the same number of energy levels
3. the same atomic radii
4. similar masses

4) A loss or gain of electrons by an atom causes a corresponding change in

1. the number of protons
2. the number of neutrons
3. the atomic number
4. size

5) Group VIIA elements are

1. inert at room temperature
2. known as the halogens
3. the largest atoms on the periodic table
4. low in electronegativity

6) In the modern Periodic Table, the elements are arranged according to

1. atomic mass
2. atomic number
3. oxidation number
4. mass number

7) How many halogens are in Period 3 of the Periodic Table?

1. 1
2. 2
3. 3
4. 4

8) An atom of an element contains 20 protons, 20 neutrons, and 30 electrons. This element is

1. an alkali metal
2. an alkaline earth metal
3. a halogen
4. a noble gas

9) Which element in Period 3 has the greatest tendency to gain electrons?

1. Na
2. Si
3. Cl
4. Ar

10) Which of the following elements has the most pronounced metallic properties?

1. C
2. Al
3. Co
4. Rb