Chemistry 1
how many electrons can be in the first electron shell?
2
How many electrons can be in the 2nd electron shell?
8
How many elements are there?
118
What number do you use to find the number of protons?
atomic number
Name a physical change
change from ice: Solid to liquid or gas
Which statement is true about compounds:
1. Contain two or more atoms of one type of element.
2. Contain atoms of two or more elements bonded together.
3. Contain individual atoms.
4. All of the above.
2
How many periods are shown on the periodic table?
7
What is the atomic number of neon (Ne)?
10
An element in the same period have the same number of
energy shells
A reaction which absorbs heat (gets colder) is:
A: Endothermic OR B: Exothermic
Endothermic
A negatively charged ion
Anion
What is in the nucleus of an atom?
protons and neutrons
Which ones are the periods in the periodic table?
Top to bottom or left to right?
top to bottom
Which ones are the groups in the periodic table?
Top to bottom or left to right?
left to right
Exothermic is an INCREASE or DECREASE in temparature?
increase in temperature
Will oxygen accept or donate electrons? How many?
Accept two electrons
The sum of protons and neutrons in the nucleus of an atom is known as the _________
Mass number
Physical or Chemical change?
Match burning
chemical