Subatomic Particles

An atom of Chlorine, Cl, has an atomic number of 17 and a mass of 35. How many subatomic particles are OUTSIDE the nucleus

• 17

• 35

• 18

An element has an atomic number of 9 and a mass of 19 amu. What is the number of electrons this element has?

• 9

• 19

• 10

• 28

Tags

NGSS.MS-PS1-1

What gives you the identity of an element?

• Mass

• Atomic number

• Protons

• Electrons

which atom has  4 neutrons?

• Li-6

• Li-7

• Li-8

• they have the same # of neutrons

Tags

NGSS.MS-PS1-1

Which subatomic particles contribute the most to the mass of an atom?

• Protons, Neutrons, Electrons

• Protons only

• Protons and Electrons

• Protons and Neutrons

If an atom has 12 positively charged subatomic particles, which of the following must it also have to be considered a neutral atom?

• 12 neutrons

• 12 electrons

• 12 protons

• 24 protons and neutrons

Tags

NGSS.MS-PS1-1

Which particles are found in the nucleus

• electrons and protons

• neutrons and protons

• neutrons and electrons

• footballs and soccer balls

How many protons are in the nucleus of Helium (He, atomic number 2)

• 0, they are all outside of the nucleus

• 1

• 2

• 3

Tags

NGSS.MS-PS1-1

The positive particles of an atom are 

• electrons 

• positrons 

• neutrons 

• protons 

An atom becomes _______ when it loses electrons.

• Positive

• Negative

• Neutral

• Invisible

Tags

NGSS.MS-PS1-1