8th Grade Science ATOMS Review

How many electrons does an atom of oxygen have?

How many neutrons does an atom of gold - Au- with a mass of 198 have?

What is the number of neutrons in Hydrogen-1?

What is the charge of a proton, neutron, and electron,respectively in that order?

Which subatomic particle is always the same for atoms of the same element?

Which two subatomic particles have the same mass (size)?

What is the atomic number for this element?

A neutral atom of copper has 29 electrons and 34 neutrons. How many electrons does it have?

Arsenic has an atomic mass of 75 and 33 protons. How many neutrons does arsenic have?

Which of these best describes one of the subatomic particles found in center of this atom?

Which of the following best describes an electron?

What is the smallest subatomic particle of an atom?