covalent bonding

Question 1

an experiment is used to test the electrical conductivity of potassium iodide crystals. Lamp does not light up, distilled water is added, lamp lights up. explain

Answer 1

oppositely charged ions are free to move in the solution when potassium iodide dissolves

Question 2

Why do metals have a sea of electrons and nonmetals don’t?

Answer 2

Metals are typically trying to get rid of electrons. So they form a loosely held sea of electrons.

Question 3

how many electrons must atoms share

Answer 3

Each atom must share same number of electrons

Question 4

non metals react with non metals by

Answer 4

sharing their valence electrons

Question 5

Why do metals have a sea of electrons and nonmetals don’t?

Answer 5

Metals are typically trying to get rid of electrons. So they form a loosely held sea of electrons.

Question 6

molecules are formed when

Answer 6

atoms combine by sharing electrons

Question 7

negatively charged electrons pull

Answer 7

positively charged nucleus together, forming a strong electrostatic force

Question 8

how do the bonds between nitrogen and hydrogen form

Answer 8

electrons are shared between nitrogen and hydrogen
the covalent bond is a shared pair of electrons

Question 9

Predict the physical state of hydrogen fluoride at room temperature and pressure. (covalent bonding)

Answer 9

gas OR liquid
made of small molecules
has low melting point
has low boiling point
forces between molecules are weak