Atoms, Ions, and Isotopes

If you had an atom, and change the number of electrons, you would now have a(n)...

• ion

• compound

• isotope

• different element

The atomic number is equal to _.

• the number of protons

• the number of neutrons only

• the total number of protons and neutrons

• the number of protons, neutrons, and electrons

An atom of Lithium (Li) loses an electron. What would we call it now?

• an ion

• an isotope

• Helium

• Beryllium

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Is this image showing an ion or a normal/neutral atom?

• normal/neutral atom

• ion

Tags

NGSS.MS-PS1-1

Helium (He atomic number 2) has 2 protons, 2 neutrons, and 2 electrons. If you wanted to show a different isotope of Helium, what would you have to do?

• change the number of neutrons

• take away an electron

• add a top quark

• take away a proton

Tags

NGSS.MS-PS1-1

The mass number is equal to ____.

• the number of protons only

• the number of neutrons only

• the total number of protons and neutrons

• the number of protons, neutrons, and electrons.

This is a picture of a single particle of Calcium (Ca, atomic number 20 with 22 electrons). Is this picture showing an atom, an ion, or an isotope

• atom

• isotope

• ion

Tags

NGSS.MS-PS1-1

How many protons does this isotope of Titanium have? (Titanium has an atomic number of 22, and this isotope has a mass number of 48)

• 48

• 22

• 26

• 70

Tags

NGSS.MS-PS1-1

What element is this? What is the mass number of this atom? (there are 11 protons and 12 neutrons and 11 electrons)

• sodium, 23

• magnesium, 23

• magnesium, 12

• sodium, 11

Tags

NGSS.MS-PS1-1

Which isotope has 4 neutrons? (the number in the top-left is the mass number)

• Li-6

• Li-7

• Li-8

• None of these have 4 neutrons

Tags

NGSS.MS-PS1-1