Atomic structure and the Periodic table

1. The atomic number identifies the number of __________.

• protons

• electrons and neutrons

• atoms

• neutrons

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

5. The group number equals?

• The number of energy levels

• The number of neutrons

• The number of protons

• The number of electrons on the outer shell

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

What is the mass number of Potassium (K) atom that has 20 neutrons?

• 18

• 20

• 19

• 39

In an atom, the number of protons is equal to the number of ____________.

• energy levels

• neurons

• electrons

• neutrons

Which subatomic particle has a negative charge

• Electrons

• Neutrons

• Protons

subatomic particles found on the outermost shell & responsible for the atom's reactivity

• neutrons
• electrons

• isotopes
• ions

Subatomic particles with a positive charge

• neutrons
• atomic mass
• protons
• isotopes