science chem review Flashcards
(7 cards)
0
Q
What does the atomic number show?
A
The number of protons
1
Q
What are the 4 groups on the periodic table?
A
Group 1 is the alkali metals
Group 2 is the alkaline earth metals
Group 3 is the halogens
Group 4 is the noble gases
2
Q
What is the atomic mass
A
The average mass of the nucleus
3
Q
What are the4 ways to tell a chemical change has occurred?
A
New colour, heat or light, ga bubbles, a solid precipitate was formed
4
Q
How do you do standard atomic notation?
A
Mass is on top symbol is in middle and atomic number is on bottom
5
Q
What is an ion?
A
An atom Or group of atoms with either a positive or negative charge
6
Q
What are the molecular prefixes?
A
Mono Di Tri Tetra Penta Hexa Hepta Octa Nona Deca
