Atomic Structure Basics
The smallest unit of matter that holds all the properties of an element.
Atom
Proton
How many protons does an atom of Nickel (Ni) have?
28
A chart used to organize elements based on their properties.
Periodic Table
Round 34.29 to the nearest whole number
34
What is the element symbol for Gold (79)?
Au
This subatomic particle is negatively charged.
electron
How many electrons does a neutral atom of Tungsten (W) have?
74
An atom with a different number of electrons than protons is called a(n)...
ion
Round 9.752 to the tenths place
9.8
This subatomic particle identifies which element an atom is.
Proton
This subatomic particle has no charge.
Neutron
How many neutrons does an atom of Argon (Ar) have?
22
This number is equal to the number of protons in an atom.
Round 5278 to the nearest thousand
5000
Which subatomic particles have a mass of 1amu (atomic mass unit)
protons and neutrons (1amu each)
These subatomic particles are found in the nucleus
protons and neutrons
How many neutrons does an atom of Iron (Fe) have?
30
Atoms of the same element that have a different number of neutrons are called...
isotopes
Round 1269.32 to the nearest hundred
1300
Where are the electrons found in an atom?
electron cloud
This subatomic particle is ignored when calculating atomic mass.
electron
How many electrons can the first electron shell hold?
2
The electrons on the outermost shell of an atom are called...
valence electrons
Round 7.3994 to the hundredths place
7.40