1. Week 4
Elements in the same group/family have similar chemical properties because
Their electrons are inside the nucleus
They have the same number of electrons in their valence shell
They have the same number of neutrons in their nucleus
They have similar atomic radii
2. Lithium has an atomic number of 3. How many valence electrons are in its valence shell?
1 C. 3
2 D. 8

2. 3. What is the greatest number of valence electrons an atom can have?
3 D. 12
4. Why are Group 16 atoms reactive?
They want to gain one electron
They want to gain two electrons
They want to lose one electron to become stable
Their outer shell is full of electrons

3. 6. Which of the following symbols does not represent an element?
5. Identify the statement that describes the objects that will be attracted to a negatively charged object.
Negatively charged objects
Positively charged objects
Both negatively charged and neutral objects
Both positively charged and neutral objects
6. Which of the following symbols does not represent an element?
Li C. Na
Bt D. Mg

4. 7. When an atom loses an electron, it becomes a
Positive ion
Negative ion
Neutral ion
Neutral atom
8. The atomic number for beryllium is 4. Select the number of electrons a beryllium will gain or lose when it forms a beryllium ion.
Gain 2 C. Lose 2
Gain 4 D. Lose 4

5. 9. What is the total number of electrons in a Fluorine atom?19 10 12
10. The nucleus of an atom of gold -198 contains
79 protons and 119 neutrons
79 protons and 118 neutrons
197 protons and 197 neutrons
198 protons and 198 neutrons