Masses and Atoms

The smallest part of an element is called a(n) _________________.

• proton

• neutron

• atom

• electron

The center of an atom is called the _________.

• electron cloud

• atomic center

• neutron cloud

• nucleus

Tags

NGSS.MS-PS1-1

What two subatomic particles are located in the nucleus?

• neutrons and electrons

• protons and neutrons

• protons and electrons

Tags

NGSS.MS-PS1-1

The negatively charged particles that orbit around the outer part of an atom are called ___________.

• electrons

• protons

• neutrons

Tags

NGSS.MS-PS1-1

Neutrons have what type of charge?

• positive

• negative

• neutral (no charge)

The area outside of the nucleus is called the __________________ and it has a _____________ charge.

• proton field, negative charge

• electron shells, negative charge

• electron shells, positive charge

• proton field, positive charge

Tags

NGSS.MS-PS1-1

How many protons are in an atom of iron?

• 55.845

• 26

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NGSS.MS-PS1-1

How many protons are in an atom of lead?

• 82

• 207.2

Tags

NGSS.MS-PS1-1

Select all the examples of elements.

• Oxygen- O

• Salt- NaCl

• Hydrogen- H

• Water- H₂O

• Gold- Au

Tags

NGSS.MS-PS1-5

What is formed when two or more elements bond together?

• molecule

• solution

Tags

NGSS.MS-PS1-1