Molecules and Bonds

Question 1

What’s the farthest layer of a electron called?

Answer 1

The valence shell: controls how atoms connect with atoms to make molecules, molecules connect with molecules to make matter

Question 2

How many electrons are required to make an atom complete?

Answer 2

8 electrons in the valence shell: if they are missing some electrons they will share electrons or take them

Question 3

What is a covalent bond?

Answer 3

A bond where atoms share electrons

Question 4

What is a ionic bond?

Answer 4

A bond where atoms give and take electrons

Question 5

Are all covalent bonds equal?

Answer 5

Two atoms could share electrons so they have 8 in their valence shell: if one atom is bigger than the other, the electrons will crowd the bigger one (so no)

Question 6

What’s a polar covalent bond?

Answer 6

Since electrons are negative, the atom they spend their time around becomes more negative
(the atom that they spend less of their time with becomes more positive)

Question 7

Why are polar covalent bonds important?

Answer 7

They’re important because of water: water is the most important in a polar covalent bond
(almost any substance with an ionic bond can be dissolved in water)