Laurel Springs Honors Chemistry Final Exam

What determines the identity of an atom?

• number of protons

• number of electrons

• number of neutrons

• number of valence electrons

The particles in an atom that are neutral (have no charge) are called __________.

• negatrons

• electrons

• neutrons

• protons

Protons have a _____ charge while electrons have a _____ charge.

• positive; negative
• negative; positive
• neutral; positive
• negative; neutral

Tags

NGSS.MS-PS2-3

If a neutral atom has 3 electrons, how many protons does it have?

• 7

• 6

• 4

• 3

An atom will be neutral (have no charge) if the number of protons is equal to the number of _____.

• protons

• neutrons

• electrons

• octets

How many protons does an atom with an atomic number of 6 have?

• 6

• 12

• 3

• cannot be determined

Tags

NGSS.MS-PS1-1

What does the 1.00794 stand for?

• hydrogen

• atomic number

• atomic mass

• valence electrons

Tags

NGSS.HS-PS1-1

What is the atomic mass for silicon?

• 16

• 32

• 28

• 14

How many protons does Cu have?

• 42

• 29

• 58

• 25

What is the atomic mass of copper?

• 64

• 29

• 35

• 63