WorksheetsUnit 3 Review
Total questions: 10
Worksheet time: 5mins
what part of the atom determines what an element is?
neutron
proton
electron
electron cloud
Outermost electrons are:
cloud electrons
orbital electrons
valence electrons
far electrons
where is most of the mass of an atom located?
proton
nucleus
electron cloud
spread out all over
What is the chemical symbol for Hydrogen?
He
Hi
H
Hg
Atoms with same protons but different neutrons are called a(n):
ion
isotope
molecule
nuclei
How many electrons are in the ion Ca +2
18
20
22
40
On the periodic table group numbers tell us:
valence electrons
energy levels
protons
how it bonds
Elements are arranged on the periodic table based on their:
number of protons
number of electrons
atomic mass
number of neutrons
An element in group one like Sodium (Na) will likely form an ionic bond with an element in group
16
17
18
1
A positively charged ion is a(n):
anion
cation
onion
dogion
