crossword
Crossword
Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter. Click on a number in the grid to see the clue or clues for that number.
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Check
Across:
2.
A group of atoms carrying a charge is known as a ion.........
5.
Mass of 1 mole of a substance is called its..................
Down:
1.
The.................. unit mass of a substance is a sum of the atomic masses of all atoms in a formula unit of a compound
3.
The ................ mass of a substance is the sum of the atomic masses of all the atoms in a molecule of the substance.
4.
The chemical formula of a molecular compound is determined by the ,.................. of each element
OK