H Chemistry S1 Review (Units 1-2)

What is the charge of a proton?

• Positive

• Neutral

• Negative

• Undefined

Where is the electron located in an atom?

• Nucleus

• Electron cloud

• Neutron shell

• Proton layer

An atom with 16 protons and 18 electrons has a net charge of:

• +2

• -2

• Neutral

• -4

Which subatomic particle determines the element's identity?

• Neutron

• Proton

• Electron

• Nucleus

What is structurally similar in isotopes of the same element?

• Number of neutrons

• Number of protons

• Number of electrons

• • Atomic mass

Magnesium-25 has how many protons?

• 12

• 13

• 11

• 25

If lithium's average atomic mass is 6.94 amu, which isotope is more abundant?

• ⁶Li

• ⁷Li

What is the percent abundance of chlorine-35 if chlorine-37 is 25%?

• 25%

• 50%

• 75%

• Cannot be determined

Which element is the most reactive metal?

• Mg

• Sr

• Cs

• Ca

Which pair has the most similar properties?

• Ca & K

• Ca & Mg

• Mg & K

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2