Approximately how long has the Moon been geologically inactive?

A. 1 billion years

B. 3 billion years

C. 4 billion years

D. 4.5 billion years

What can a drop of liquid mercury be described as? A) a pure substance and a compound B) an impure substance that is reactive C) an impure substance that is unreactive D) a pure substance and an element

Which of the following examples does NOT describe nuclear fission? Bombarding uranium nuclei with beta particles to produce two lighter atomic nuclei. Colliding hydrogen atoms to produce heavier helium atoms.

Which of these statements correctly describes covalent bonds? A) Covalent bonds are formed between a metal and a nonmetal. B) The formation of covalent bonds involves the sharing of electrons.

How many moles of air are in 1.00 L at - 23 C anf 101 KPa?

Rocks are broken down into sediment during?

Which of these is a chemical property? A. Mercury is a dense liquid. B. Iodine vapor has a purple color. C. Aluminum is a very conductive metal. D. Ice melts at 0°C. E. Iron rusts in wet weather.

Which of the following is not true about the importance of the carbon cycle to living things? a. Plants use carbon dioxide to make energy. b. Carbon is the second most abundant molecule in organisms. c.

Fruit flies can either have a brown body or a black body. The allele for a brown body (B) is dominant to the allele for a black body (b). A brown fruit fly was crossed with a black fruit fly as shown below.

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

The first ionization energy, e, of a potassium atom is 0.696 aj. what is the wavelength of light, in nm, that is just sufficient to ionize a potassium atom? values for constants can be found here.