Chemistry Flashcards
(8 cards)
1
Q
Why is relative mass needed
A
Because elements can exist as a number of isotopes, so relative mass is used instead of mass number
2
Q
What is a compound
A
Substances formed from two or more elements
3
Q
What is a element
A
A substance made from atoms with same number of protons
4
Q
What is a isotope
A
A form of a element with same number of protons but different neutrons
5
Q
Do isotopes have the same mass number
A
No they have different mass and same atomic number
6
Q
What is a mixture
A
A lot of things mixed together such as elements or compounds
7
Q
What does insoluble mean
A
A solid that can’t be dissolved in a liquid
8
Q
What does soluble mean
A
A solid that can be dissolved in a liquid
