Atomic Number, Atomic Mass and Isotope Concept Check s

The most common isiopte of gallium has a mass number ​ of ​ ​ (a)  

• 70
• 31
• 69

Tags

NGSS.MS-PS1-1

Match the following elements to the correct description

• noble gas

• carbon, C

• has 9 electrons in a neutral atom

• neon, Ne

• most comon isotope has 6 neutrons

• fluorine, F

• has 17 protons in its nucleus

• chlorine, Cl

• most common isotope has a mass of 24

• magnesium, Mg

Tags

NGSS.MS-PS1-1

Label the parts of the atom. Not all labels will be used!

a

b

c

d

e

electron cloud

electron

neutron

compound

proton

nucelus

Tags

NGSS.MS-PS1-1

Match the following descriptions to the best term

• protons & neutrons

• if you change the number of protons you get a different...

• neutrons

• if you change the number of neutrons you get a different...

• mass

• an isotope has the same number of protons but a different number of...

• element

• these are in the nucleus

• nucleus

• the mass of the atom is found here

Tags

NGSS.MS-PS1-1

The most common isotope of sodium has how many neutrons?

• 23

• 11

• 2, 8, 1

• 12

Tags

NGSS.MS-PS1-1

Label the following isotope symbol. Not all labels will be used!

a

b

c

Atomic number

Element Symbol

number of neutron

Mass Number

Tags

NGSS.MS-PS1-1