Unit 1 : preparatory stage - year 1

اختبار خاص بالمعلم: hend walid
1
The colour property is a distinguishing factor between..........
2
The motion of solid molecules is..........
3
The chemical symbol of nitrogen atom is..........
4
The smell property is a distinguishing factor between...........
5
The liquid matter is characterized by all of the following except..........
6
The atom nucleus contains..........
7
The volume of liquid is calculated from the relation..........
8
The attraction force between water molecules is............. that between water vapor molecules.
9
The sum of the numbers of protons and neutrons in the nucleus of the atom is known as.........
10
The density of a substance whose mass is 15 gm and occupies 30 cm³ is........... the density of water.
11
It is a substance which is formed from the combination of atoms of two or more different elements with constant weight ratios.
12
Negative charged particles of negligible mass are..........
13
The density of petroleum oil is.......... that of water.
14
........... is the monoatomic liquid molecule.