Properties of Atoms

The particles that are found in the nucleus of an atom are

• neutrons and electrons

• electrons only

• protons and neutrons

• protons and neutrons

Which subatomic particle has a negative charge?

• Electons

• Protons

• Neutrons

• Ions

What gives an atom mass?

• Protons & electrons in the cloud

• protons & neutrons in the nucleus

• electrons in the cloud

• Protons & electrons in the nucleus

The sum of the protons and neutrons in the nucleus of an atom

• Mass Number (also called Atomic Mass)

• Atomic Number

• Compound

• Electrons

How many neutrons does Chlorine (Cl) with an atomic number of 17 and an atomic mass of 35.

• 17

• 19

• 18

Tags

NGSS.MS-PS1-1

How many protons does this element have?

• 40

• 20

• 41

• 21

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NGSS.MS-PS1-1

Scandium atoms have an atomic number of 21 and atomic mass of 45. What is NOT true about Scandium atoms?

• It has 24 neutrons.

• A neutral atoms has 21 protons and 21 electrons

• It has 21 neutrons.

• It has 21 protons.

Tags

NGSS.MS-PS1-1

An atom is neutral if:

• it has the same number of protons and neutrons.

• it has an even number of valence electrons.

• it has the same number of electrons and neutrons.

• it has the same number of protons and electrons.

A neutron has a charge of

• No charge

• +1

• +2

• -1

The smallest particle into which an element can be divided and still be the same element is a(n)

• Proton

• Atom

• Neutron

• Electron

Tags

NGSS.MS-PS1-1