Atoms, Ions, and Isotopes

Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...

• ion
• mixture
• isotope
• neutral atom

Tags

NGSS.HS-PS1-8

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

What is the charge on a lithium atom that loses 1 electron?

• +1

• 0

• -1

• -2

Is the element shown in this image an ion, isotope or neutral atom?

• neutral atom

• isotope

• cation (+ ion)

• anion (- ion)

Helium (He atomic number 2) has 2 protons, 2 neutrons, and 2 electrons). Is the He element shown above a neutral atom, an ion, or an isotope?

• atom

• cation (+ ion)

• isotope

• anion (-)

The mass number of an atom 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.

What would be the net charge on the element shown above?

(Calcium - atomic number 20)

• cation +1 charge

• cation +2 charge

• anion -1 charge

• anion -2 charge

How many protons does this isotope of titanium have? Hint titanium has an atomic number of 22.

• 48
• 22
• 26
• 70

Tags

NGSS.MS-PS1-1

What element is this? What is the mass number of this atom?

• sodium, 23

• magnesium, 23

• magnesium, 12

• sodium, 11

Which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

Tags

NGSS.MS-PS1-1