SC9 QUIZ 2-2: Atoms, Atomic Mass, Neutrons

Which two particles make up the nucleus of an atom?

• Protons and Electrons
• Protons and Neutrons
• Molecules and Compounds
• Neutrons and Electrons

What is the role of an electron in an atom?

• Electrons live inside the nucleus and carry a neutral charge.
• Electrons circle the nucleus and have a positive charge.
• Electrons circle the nucleus and have a negative charge.
• Electrons live inside the nucleus and have a negative charge.

The atoms of any given element ____ have the same number of protons.

• sometimes
• always
• never

A student creates the model of a carbon-12 atom shown. He wants to add 3 more sub-atomic particles to the model to create a carbon-15 atom. Identify how many protons and neutrons he should add to the model.

• 3 Neutrons

  0 Protons

• 2 Neutrons

  1 Proton

• 1 Neutron

  2 Protons

• 0 Neutrons

  3 Protons

What is the mass of a carbon atom that has 6 protons, 7 neutrons, and 6 electrons?

• 6

• 7

• 13

• 19

How many neutrons does calcium have?

• 20

• 40

• 60

• 0

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

• 14
• 7
• 15
• 18

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

• lithium
• gold
• nitrogen
• carbon

Which element is this?

• Nickel

• Neon

• Sodium

• Nitrogen

An atom has:

8 Protons

7 Neutrons

6 Electrons

What is the total charge? Be sure to indicate whether it is + or - (e.g. +5, -5)

(a)