Welcome to your G.Science Grade 8 Chapter 2
General Science Grade 8 Chapter 2
1.
The sum of the number of protons & neutrons in an atom is known as -------------------
2.
Which one of the following is true about discreteness theory of matter?
3.
An atom of 2713 Al3+ contains
4.
Which of the following molecule are molecules of elements?
5.
Which of the following is not polyatomic molecule?
6.
The total number of sub- atomic particles in 40/18 Ar is:
7.
The number of electrons, protons and neutrons in 19/9F are respectively:
8.
Which of the following is true about the idea of Aristotle?
9.
The two regions of an atom are____
10.
Which one is numerically equal with number of protons?
