Structure of the Atom

What is the nucleus of an atom made of?

• Protons & neutrons

• Electrons

• Protons & electrons

• Electrons & neutrons

Tags

NGSS.MS-PS1-1

The nucleus of an atom makes up _____ of its mass.

• Almost none

• 50%

• 90%

• 99.9%

Tags

NGSS.MS-PS1-1

What is the relationship between the size of the nucleus and the size of the atom?

• The nucleus is about half the size of the atom.

• The nucleus is twice as big as the atom.

• The nucleus is about 100 times smaller than the atom.

• The nucleus is about 100,000 times smaller than the atom.

Neutrons have __________ charge.

• positive

• negative

• no

Protons have __________ charge.

• positive

• negative

• no

Tags

NGSS.MS-PS1-1

Electrons have __________ charge.

• positive

• negative

• no

Tags

NGSS.MS-PS2-3

Which particle has almost no mass?

• Protons

• Neutrons

• Electrons

What does amu stand for?

• Atom matter unit

• Atomic mass unit

• All mighty unicorn

Which best describes the movement of electrons?

• They follow fixed paths in the atom.

• They move slowly.

• They are constantly moving.

• They only move when the atom is part of a gas.

Tags

NGSS.HS-PS2-5

Most of the atom is empty space.

• True.

• False.

Tags

NGSS.MS-PS1-1