Structure of an Atom

What is the smallest unit of matter?

• An element

• A drop of water

• A speck of dust

• An atom

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The subatomic particles are called:

• protons, nucleus and electrons

• protons, electrons and neutrons

• protons, positives and negatives

• cloud, shell and quarks

Tags

NGSS.MS-PS1-1

The central region of an atom where its neutrons and protons are is its

• nucleus

• core

• electron cloud

• centre

All matter is made of

• energy

• electrons

• atoms

• compounds

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

What is the relative charge of an electron?

• 1

• Neutral

• -1

Tags

NGSS.MS-PS1-1

What is the mass number?

• the number of protons

• the sum of the number of protons and the number of neutrons in the nucleus of an atom 

• the number of electrons

• the number of neutrons

What goes in place of the question marks?

• Element name

• Atomic Mass

• Atomic Number

• Electrons

What element has only one electron?

• Helium

• Carbon

• Lithium

• Hydrogen

A particle that moves around the nucleus is a(n)...

• Proton

• Neutron

• Electron

• Quark

Which statement correctly describes the location and charge of the neutrons in an atom?

• The neutrons are inside the nucleus and have a positive charge.

• The neutrons are outside the nucleus and have a neutral charge.

• The neutrons are outside the nucleus and have a negative charge.

• The neutrons are inside the nucleus and have a neutral charge.