[" An element "x" "has mass number "35" and number of neutrons is "18" idennify the group "],[" number and period of "X." "],[" What is the basic principle of modern periodic table? "]

An element ''X'' has mass number 35 and number of neutrons is 18. Identify group number and period of the element ''X''.

An element X has mass number 35 and number of neutrons = 18. Write atomic number and electronic configuration of X. Also write group number, period number and valency of X.

An element X has mass number 35 and the number of neutrons in its atom is 18. (a) To which group of the periodic table element X belongs? (b) To which period of the periodic table element X belongs? (c) What will be the formula of molecule of element X?

Write the total number of periods in modern periodic table.

An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.

An element 'X' has mass number 35 and number of neutrons 18. Write atomic number and electronic configuration of 'X'. Also write group number, period number and valency of 'X'.

Indicate the group number and period number of phosphorous in the modern periodic table