FREE ONLINE CHEMISTRY TEST 02

Which period contains only two elements?

The most metallic element among the following is:

Which of the following is a metalloid?

The first transition series begins with

Across a period, atomic size generally

Group 2 elements are called

The element with electronic configuration [He] 2s² 2p⁵

Which pair is isoelectronic?

The element with the highest electronegativity is:

Which is a noble gas?