Atoms and Molecules (L.o.L.)

In a neutral atom, the number of electrons are equal to the number of _________.

• its atomic mass

• neutrons

• charges

• protons

The atomic number of an element is equal to its number of __________.

• neutrons

• protons

• its atomic mass

• charges

Protons have a ______ charge, and electrons have a _______ charge.

• positive/negative

• negative/positive

• positive/positive

• negative/negative

Tags

NGSS.MS-PS2-3

How many protons does a helium atom contain?

• 4

• 1

• 2

• 8

Tags

NGSS.MS-PS1-1

The number of neutrons is equal to its mass minus the number of protons.

• True

• False

How many neutrons does an atom of nitrogen contain?

• 14

• 21

• 14.01

• 7

Tags

NGSS.MS-PS1-1

Atoms can't be bonded together.

• True

• False

Tags

NGSS.MS-PS1-1

_______ is the most abundant substance in the universe.

• Hydrogen

• Helium

• Carbon

• Oxygen

Tags

NGSS.MS-PS1-1

Why can't hydrogen bond with more than one atom?

• It is shy.

• It only has one proton.

• It only has one electron.

Tags

NGSS.HS-PS1-2

_________is the most common element among all life forms.

• Hydrogen

• Carbon

• Oxygen

• Nitrogen