Periodic Table

Which of the following element X can most readily react with hydrogen gas to form HX?

Which Group 2 element has the higher 1^st ionisation energy?

What is the electronic configuration of potassium ion (K+)?

Which of the following element exists as a solid in room temp and react vigorous with water

Across the Period from left to right (same period), shielding effect due to inner electrons

Calcium is a Group 2 element. When calcium reacts with oxygen gas, the product formula is:

Element in Group ____________ forms ions with charge of -1

Which statement is False between a period 2 and period 3 element in the same group.

Which of the following simplified word eqn is related to the 1^st ionisation energy of sodium?

There is a general decrease in ionisation energy from Na to Mg to Al. (True/False)

What is the electronic configuration of magnesium (Mg)?

Which Period 4 element has the higher 2^nd ionisation energy?

Across the Period from left to right, atomic radius of elements

Nuclear charge of Neon (Ne) is higher than Fluorine (F). True/False

Down the group, the number of valence (outermost) electrons

What is the atomic mass of Ar?