Advertisements
Advertisements
Question
An element A has 2 electrons in its fourth shell. State its electronic configuration.
Advertisements
Solution
Its electronic configuration is 1s22s22p63s23p64s2.
APPEARS IN
RELATED QUESTIONS
Consider the following elements:
Ca, Cl, Na, I, Li, Ba, Sr, K, Br
Separate these elements into three groups (families) of similar properties. State one property in each case on the basis of which you have made your choice.
How would the tendency to lose electrons change as we go from left to right across a period of the periodic table?
How does the chemical reactivity of alkali metals vary on going in group 1 of the periodic table?
How many periods and groups are there in the modern periodic table?
Give the symbol and valency of the following element and radical.
Hydroxide
Give the chemical formula of sodium bicarbonate
Give the chemical formula of sodium sulphite
Give the chemical formula of ammonium sulphate
State the number of elements in Period 2 of the Periodic Table.
Match the atomic number with the following:
An element of group 2.
