Foundation Chemistry, FCH 1540, 2 March 2013

3. Plants produce this gas for everyday living.
4. In 1912, he discovered the neutron, an electrically neutral particle with a mass similar to that of the proton's.
5. The simplest ratio in which the elements of a compound combine with each other to form the compound.
9. Atoms of the same element having the same atomic number but consisting of different atomic numbers.
10. A region in which there is a high prop-ability of electronic movement.
11. This element belongs to group 4 and is located in period 3.
12. This gas fills up party ballons.
14. It refers to the number of electrons that an atom can accept, donate or share, in order to achieve the structure of the nearest noble gas.

1. The number of protons in the nucleus of an atom of an element.
2. The mass of one mole is called the .......
6. This implies that only one mole of any gas at STP is able to occupy a volume of 22,4dm3.
7. This scientist stated that "protons are not evenly distributed throughout the atom, but is concentrated inside the nucleus."
8. Its symbol is capital N and small capital A, .
13. This gas is used to fill the bright lights, which flashes various colours, in big cities.
15. This element makes the the rock which most women love to have on their fingers.