Atomic Structure TEST

Elements whose atoms have the same number of valence electrons are in the same

• row

• group

• category

• period

Protons and neutrons are found in the center of the atom called the:

• nucleus

• neutron

• shell

• cell

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

How many electrons does this picture show?

• 4
• 5
• 6
• 3

The number in the upper corner of an element tile (7 for nitrogen) is called _____

• the proton number
• the atomic number
• the electron number
• the mass number

If an atom contains exactly three protons, then it's an atom of _____

• lithium
• gold
• nitrogen
• carbon

For an atom to be electrically neutral, it must contain the same number of _____

• protons and neutrons
• neutrons and electrons
• protons and electrons
• nucleons and electrons

An atom has 14 protons, 15 neutrons and 14 electrons. Its mass number is….

• 14
• 15
• 28
• 29

How would you write the isotope name in hyphen form?

• Sodium-23

• Sodium-11

• Sodium-12

• Sodium-22

What do these isotopes of carbon all have in common? (ignore the number under the symbol)

• neutrons & mass number

• atomic number and neutrons

• atomic number and electrons

• protons, atomic number, and mass number