DCA Review

Which of these has the least amount of mass?

• proton

• neutron

• electron

A proton has a ​ ​ (a)   charge,

a neutron has a ​ (b)   charge,

and an electron has a ​ (c)   charge.

• positive
• neutral
• negative

Which of the following are NOT found in the nucleus of the atom?

• protons

• neutrons

• electrons

The overall charge of an atom is _______.

• 1

• -1

• 0

• always changing

What element is in period 4 group 12?

• copper

• zinc

• gallium

• gold

How may protons does Xenon have?

• 131

• 77

• 18

• 54

What determines the number of valence electrons an atom has?

• Its group

• Its period

• Its atomic number

• Its mass

How many valence electrons does oxygen have?

• 8

• 3

• 6

• 7

What is the name for the elements in group 18?

• alkali metals

• halogens

• noble gases

• alkaline earth metals

What is the formula for potassium sulfide?

• KS

Tags

NGSS.MS-PS1-1