CHEM 1305 Exam 2

Why are the atoms masses in the periodic table not whole numbers?

• the mass number are averages of all the isotopes

• the isotopes are all the same number

• the number of protons vary between the masses

• what is atomic mass?

What isn't a property of an electron

• weighs less than 1 amu

• deturmens charge

• determines element

• has (-) charge

 The number of nonbonding pairs in the ammonia (NH3) molecule is??

• 0

• 1

• 2

• 3

What would be the Molecular Shape of a molecule with 2 NBP, with 4 total substituents.

• Bent

• Trigonal Planar

• Trigonal Bipyramidal

• whats MS

Which of the following elements has the highest electronegativity?

• Fluorine

• Oxygen

• Chlorine

• Nitrogen

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which of the following bonds would be the most polar?

• C-H

• C-F

• B-F

• C-P

 Which color of light comes from the higher energy transition, red or blue?

• Blue is a higher frequency and therefore corresponds to a lower energy level transition.

•  Red is a higher frequency and therefore corresponds to a lower energy level transition.

• Red is a higher frequency and therefore corresponds to a higher energy level transition.

• Blue is a higher frequency and therefore corresponds to a higher energy level transition.

Tags

NGSS.HS-PS4-1

NGSS.HS-PS4-3

When is the geometry of a molecule not the same as its molecular shape?

• When they're no NBP

• When the molecule is Non-Polar

• When the ion is ionic

• When there Non-Bonding pairs present

How many molecules of sucrose are in 0.500 L of a 1.00 molar solution of sucrose?

• 1 gram

• 0.5

•  3.01 × 10^23 molecules of sucrose

• 6.02 × 10^23 molecules of sucrose

• 12.04 × 10^23 molecules of sucrose

What is the solubility rule you need to know?

• like dissolves not like

• oppsites attract

• like dissolves like

• welp ¯\_(ツ)_/¯