Practice test 2

A charged atom that can be positive or negative is?

Ion

What contains almost all of the mass of an atom but takes up almost none of the volume???

Nucleus

What is a Negatively charged subatomic particle

ELECTRON

The subatomic particle that determines the atoms identity is called ???

Proton

Atoms of the same element with different numbers of neutrons is called ???

isotope

What takes up almost all do the volume of an atom but almost none of the mass???

Electron cloud

What is the type of radiation that gives of a helium nucleus (two protons and two neutrons)

Alpha

What is the rule of radiation that has the most energy aka the one that would need 5 cm of lead to stop it

It is Gamma

Guess

Symbol = 88 top left and 0 top right and 35 left bottom Atomic number = 35 Mass =88 Protons=35 electrons =35 neutrons= 53 and charge =0

How much do the original radioactive material would remain after a radioactive substance that has decayed by 4 half lives ???

It is 6.25 percent

Guess

Aloha on paper Beta on plastic and concrete/steel/lead = Gamma

Guess the right things