AP Chemistry

The wavelength for the maximum absorbance of carbon is approximately

• 300 nm

• 610 nm

• 670 nm

• 700 nm

Tags

NGSS.HS-PS4-1

The order of the elements in the periodic table is based on what?

• atomic mass

• the number of protons in the nucleus

• the electric charge of the nucleus

• the number of neutrons in the nucleus

What term is used for the joining of atoms to form new substances?

• valence electrons

• physical bonding

• energy level

• chemical bonding

Tags

NGSS.MS-PS1-5

Carbon and other nonmetals are found in which area of the periodic table?

• in the bottom rows

• on the left-most side

• on the right side

• in the middle columns

Tags

NGSS.MS-PS1-1

What happens in a covalent bond?

• Atoms gain or lose electrons and bond through charge.

• Atoms share valence electrons.

• Atoms connect through similar affinities (e.g. both hydrophobic)

According to the pH range which substance is more acidic than lemon juice

• Hydrochloric acid

• cabbage

• milk

Bleach is a strong base, what is the pH level of bleach?

• 13

• 14

• 1

• 2

Tags

NGSS.MS-PS1-2

What does pH measure?

• the amount of hydrogen (H⁺) ions

• the amount of hydroxide (OH^-) ions

• amount of water

• all of the above

What is the only substance with a neutral pH of 7?

• Milk

• Orange Juice

• Water

• Blood

In a test of pH levels, a baking soda has a pH of 9 and bleach has a pH of 12. What is true about there relationship?

• Both of the solution are Bases

• Both of the solution are Acids

• The Baking soda is an acid and the Bleach is a base

• The baking soda is a base and the Bleach is an Acid.