Q.1.
How many electrons are in the first shell of a hydrogen atom?
Q.2.
Which element has 2 electrons, 2 neutrons and 2 protons?
Q.3.
An element has 2 electrons in its inner shell, 8 in its next shell and 1 in its outer shell. What type of ion would it form?
Q.4.
An atom has 2 electrons, 2 neutrons and 2 protons. What is the atomic number of this atom?
Q.5.
An atom has 7 electrons - 2 in its inner shell and 5 in its outer shell. What group of the periodic table is this element found in?
Q.6.
An atom of which element has 11 electrons?
Q.7.
An atom contains 9 electrons. How many neutrons are there in the nucleus of this atom?
Q.8.
How many electrons are in the outer shell of a nitride 3 ion?
Q.9.
How many electrons are in the first shell of a carbon atom?
Q.10.
A fluorine atom has 9 electrons - 7 in its outer shell and 2 in its inner shell. How many electrons would be in the outer shell if it were to become a fluoride ion?