The independent variable (what you change), the dependent variable (what you measure) and the control variable (what stays the same)
1 of 13
What 3 things are in a risk assessment?
The hazards, risks and preventions
2 of 13
Define atom
Its the smallest particle in exsistance
3 of 13
Define an element
Its a substance that is made up of only one type of atom
4 of 13
What is a molecule?
Its more then one atom bonded together
5 of 13
What is a compound?
Its two or more different elements that are chemically bonded together
6 of 13
What is a mixture?
Its two or more different substances that are not chemically bonded
7 of 13
Explain the structure of an atom
Its has a nucleus which contains protons and neutrons. Outside of that is the shells. they have electrons on them. The first shell can have a maximum of two electrons on them and the rest can have eight.
8 of 13
In a element symbol, what does top number stand for?
The mass number (protons + neutrons)
9 of 13
In a element symbol, what does bottom number stand for?
The atomic (proton) number (number of protons
10 of 13
How do you calculate how many protons are in an element?
Look at the proton number
11 of 13
How do you calculate how many electrons are in an element?
Its the same as the proton number
12 of 13
How do you calculate how many neutrons are in an element?
Comments
No comments have yet been made