A
Name the 3 subatomic particles
Proton, neutron, electron
Which subatomic has a positive charge?
Proton
Which subatomic particle has a negative charge?
electron
Which subatomic particle has no charge? (neutral)
Neutron
a.m.u stands for
atomic mass unit
Where are electrons located?
Outside the nucleus in the electron cloud
Everything around us is made up of...
atoms including solids, liquids, and gases
On the board write the nickname or symbol for neutron
(n)
What is the weight of a electron?
0 amu
What is the mass number for sodium?
Atomic mass ≈ 22.99, which rounds to 23
What is an atom?
Smallest unit of matter retaining properties of an element.
Where are protons and neutrons located?
Inside the nucleus.
What is the weight of a proton?
1 amu
The center of the atom is called...
The nucleus
What is the atomic number and atomic mass for the element silicon?
atomic number = 14
atomic mass ≈ 28.09 (mass number ≈ 28)
On the board write the number of protons in the element helium.
2
On the board write the nickname for proton
p+ (+)
Name 4 alkali metals
Lithium
Sodium
Potassium
Rubidium
Cesium
If a blueberry represented an atom and was blown up to the size of a football field...the nucleus inside the blueberry would be the size of...
a marble
On the board, write the equation for finding the number of neutrons.
mass # - atomic # (or number of protons)
How many neutrons in phosporous?
31 − 15 = 16 neutrons
What do hydrogen, oxygen, and carbon have in common?
They are all nonmetals
How many protons, neutrons, and electrons does the element nitrogen have?
7,7,7
How many neutrons in the element Iron?
30
Neutrons = Mass Number − Atomic Number
56 − 26 = 30 neutrons