Unit 4 Chemistry

Atom

• It's a part of something abstract, especially one that is essential or characterstic.

• It's a thing that is composed of two or more seperate elements; a mixture.

• It's a substance made by mxing other substances together

• It's the basic unit of a chemical element and it's made of pronouns, neutrons, and electrons.

Tags

NGSS.MS-PS1-1

Molecule

• It's the basic unit of a chemical element and it's made of pronouns, neutrons, and electrons.

• It's a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

• It's a part or aspect of something abstract, especially one that is essential or characterstic.

• It's a substance made by mixing other substances together.

Tags

NGSS.MS-PS1-1

Mixture

• It's a thing that is composed of two or more seperate elements; a mixture.

• It's a group of atoms bond together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.

• It's a part or aspect of something abstract, especially one that is essential or charactistic.

• It's a substance made by mixing other substances together.

In liquid sulfur dioxide, which of the following types of intermolecular force(s) would be present?

• London dispersion forces 

• London dispersion forces, dipole-dipole forces

• London dispersion forces, dipole-dipole forces, hydrogen bonding 

• London dispersion forces, dipole-dipole forces, hydrogen bonding, covalent bonds

Tags

NGSS.HS-PS1-3

Select the subatomic particle that has a mass of 1 AMU.

Tags

NGSS.HS-PS1-8

Which one of the following substances will have hydrogen bonding as one of its intermolecular forces?

• IV only

• II and V

• I and III

• IV and II

Which number represents the hydrogen that is capable of hydrogen bonding in acetic acid?

• (i)

• (ii)

• (iii)

•  (iv)

Consider the following structures. If the A-B bonds are polar, which of the following molecules are polar?

• I and III

• II and V

•  I, II, and IV

• II and IV

Which of the following lists all intermolecular forces experienced between this molecule and an identical molecule?

• Covalent bonding, dipole-dipole, and London dispersion forces would be present. 

• Only dipole-dipole and London dispersion forces would be present

• Only covalent bonding and London dispersion forces would be present.

• Only London dispersions forces would be present.

The boiling points of three halide compounds are shown above. Which of the following identifies the substance that has the strongest intermolecular forces and provides reasoning?

• CH2Cl2, because it has the lowest boiling point.

• CH2Cl2, because it exhibits hydrogen bonding

• CH2Br2, because it has the highest boiling point

• CH2I2, because it has the highest boiling point