Elements and Atomic Structure

1. The atomic number identifies the number of __________.

• protons and electrons

• electrons and neutrons

• atoms

• neutrons and protons

2. Subatomic particles that have a negative charge

• electrons

• atoms

• protons

• neutrons

3. The number 16 for the atomic element sulfur is the

• ionic number

• atomic mass

• isotope

• atomic number

4. An elements in group 18 are non reactive, stable, and inert because

• they have 3 valence electrons and a full outer shell

• they have no valence electrons and a full outer shell

• they have 8 valence electrons and a full outer shell

5. The group number equals?

• The number of energy levels

• The number of neutrons

• The number of protons

• The number of valence electrons

Elements in the same ____________ have similar chemical properties

• period

• staircase

• group

• row

Why is group 1 highly reactive?

• It has the most energy levels

• It has 1 valence electrons

• It has the same number of protons

• It has the same number of electrons

Which of the following would change the name of the element if one was added or removed from the atom?

• neutrons

• protons

• valence electrons

• electrons

The elements Potassium, Vanadium, Manganese and Calcium are examples of

• Members of a period

• Members of a family

• Molecules

• Gases

Which element has a mass number greater than nitrogen, but less than neon?

• Oxygen

• Lithium

• Sodium

• Helium