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