Exam Review Part 1

Molecules form a polar covalent bond when

• both atoms are equally electronegative

• one atom is more electronegative than the other

Covalent bonds are

• Bonds resulting form the loss or gain of electrons

• Weak bonds formed between a hydrogen atom in a polar compound and an electronegative atom in another compound

• Very weak bonds resulting transient shifting or charges created by the constant movement of electrons

• Strong bonds resulting from the sharing of valence electrons

Tags

NGSS.HS-PS1-1

Which of the 4 elements have the strongest electronegativity?

• Carbon (C)

  Nitrogen (N)

  Phosphorous (P)

  Magnesium (Mg)

• Oxygen (O)

  Nitrogen (N)

  Carbon (C)

  Sodium (Na)

• Oxygen (O)

  Nitrogen (N)

  Chlorine (Cl)

  Fluorine (F)

• Phosphorous (P)

  Chlorine (Cl)

  Sodium (Na)

  Hydrogen (H)

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A _____ is a positively charged Ion, while a _____ is a negatively charged Ion.

In a water molecule, the oxgen has what kind charge?

• Slightly positive

• Slightly negative

• It doesn't have a charge

Water is a ________

• Polar molecule

• Nonpolar molecule

Tags

NGSS.HS-PS1-3

What property is being shown in this photo?

• Cohesive properties

• Adhesive properties

Tags

NGSS.HS-ESS2-5

Insects are able to walk on water due to _________

Water has a high specific heat due to what bonds?

• Covalent bonds

• Hydrogen bonds

Does Ice have a greater density than water?

• Yes

• No