Chemical Bonding and Valence Electrons

What is the role of valence electrons in chemical bonding?

• They determine the atomic number.

• They form chemical bonds by sharing electrons.

• They are located in the innermost electron shell.

• They increase the atomic size.

Which group in the periodic table contains elements with two valence electrons?

• Group 1

• Group 2

• Group 3

• Group 4

How does ionization energy change as you move from left to right across a period?

• It decreases.

• It remains constant.

• It increases.

• It fluctuates randomly.

What happens to electronegativity as you move from top to bottom in a group?

• It increases.

• It decreases.

• It remains the same.

• It becomes zero.

Which trend is observed in the metallic character of elements as you move from top to bottom in a group?

• It decreases.

• It increases.

• It remains constant.

• It becomes non-metallic.

WHICH TYPE OF ATOMIC BOND DESCRIBES ATOMS SHARING VALENCE ELECTRONS

IN WHAT TYPE OF BOND DOES ONE ATOM LOSE AN ELECTRON AND ANOTHER ONE GAINS AN ELECTRON?

• IONIC

• COVALENT

• METALIC

• BAIL