niver quiz 8

What is the maximum number of electrons that can fit in each of the first two energy levels in the electron cloud? 1st (innermost) level

2

If neutral atom has three electrons, how many protons does it have?

3

Who was the first person to write about an "indivisible"

Democritus

All matter is made of

atoms

List the location of each of the following particles:electron

electron cloud

11.Particles in an atom that have a negative electrical charge are

electrons

Which particle has practically no mass when compared to the other two particles?

electrons

The atom is mostly made up of

empty space.

Particles in an atom that have no electrical charge are called

neutrons

List the location of each of the following particles: Neutron

nucleus

Which two subatomic List the location of each of the following particles: Proton

nucleus

7. What is the charge of the nucleus of an atom?

positive

What is the charge of the nucleus of an atom?

positive

The positively-charged particles in an atom are called

protons

9. A neutral atom must have equal numbers of electrons

protons and neutral electrons

Which two subatomic particles contribute over 99% of the atom's mass?

protons and neutrons

What is the maximum number of electrons that can fit in each of the first two energy levels in the electron cloud? 1st 2nd level

8

What does the atomic number represent?

The number of protons in the nucleus

if Adam has an unequal number of electrons and protons, it is called a

ion

atom with the same number of protons and a different number of neutrons from other atoms of the same element is called

isotope

An atom's overall charge is

neutral