Advanced Chemistry

4. is defined as a mass equal to one twelfth the mass of an atom of carbon-12.
7. He was an Italian scientist known for his research on gas volume, pressure, and temperature
8. is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles.
11. is a pure substance consisting only of atoms that all have the same numbers of protons in their atomic nuclei.
12. The unit used to represent molar mass is
15. is defined as the ratio of the amount of each element to the total amount of individual elements present in the compound multiplied by 100.
17. s the simplest positive integer ratio of atoms present in a compound.
18. is a system of measurement that succeeded the decimalised system based on the metre
19. is an electrically neutral group of two or more atoms held together by chemical bonds.
20. a collection of functionally unrelated units which are composed of different units

1. consists of the chemical symbols for the constituent elements followed by numeric subscripts describing the number of atoms of each element present in the molecule.
2. is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical
3. step by step procedure
5. 6.022 x 10 23 is known as
6. is the unit of measurement for amount of substance in the International System of Units.
9. is the branch of science involved with elements and compounds composed of atoms, molecules and ions: their composition, structure, properties, behavior and the changes they undergo during a reaction with other substances.
10. is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds.
13. s the analysis of the relationships between different physical quantities by identifying their base quantities
14. present in a compound.
16. is the sum of all the atomic weights of an