Foundation Chemistry

2. This implies that only one mole of any gas at STP is able to occupy a volume of 22,4dm3.
3. Atoms of the same element having the same atomic number but consisting of different atomic numbers.
6. A region in which there is a high prop-ability of electronic movement.
7. Its symbol is capital N and small capital A, .
8. This element belongs to group 4 and is located in period 3.
9. Plants produce this gas for everyday living.
10. This scientist stated that "protons are not evenly distributed throughout the atom, but is concentrated inside the nucleus."
11. The mass of one mole is called the .......
12. The number of protons in the nucleus of an atom of an element.
15. This element makes the the rock which most women love to have on their fingers.

1. The simplest ratio in which the elements of a compound combine with each other to form the compound.
4. 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.
5. This gas fills up party ballons.
13. In 1912, he discovered the neutron, an electrically neutral particle with a mass similar to that of the proton's.
14. This gas is used to fill the bright lights, which flashes various colours, in big cities.