Which of the following isotopes is most useful for dating plant and animal remains?

A. potassium - 40

B. Uranium - 238

C. Carbon-14

D. Lead-212

One molecule of water (H2O) contains two atoms of hydrogen and one atom of oxygen. A hydrogen atom has a mass of 1.0 u and an atom of oxygen has a mass of 16 u, approximately.

Which is the least metallic, Lead, mercury, americium, or francium?

What is the example to the word camouflage

Which one of the ff is correct about Acids? a, acids have bitter taste b, acids have HP value of less than 7 c, acids have POH value of less than 7 d, all are correct

Fluorine (F) and bromine (Br) are in the same group on the periodic table. How do atoms of these elements compare when they form bonds? 1-Both a fluorine atom and a bromine atom lose one electron, and both atoms become stable.

Part a by drawing molecular orbital diagrams for b2, c2, n2, o2, and f2, predict which of these homonuclear diatomic molecules are magnetic.

A student states that non-metal atoms share their core electrons when they form covalent bonds. What is wrong with this statement? A. Atoms do not share electrons during covalent bonding. B.

Boron has an average mass of 10.81. One isotope of boron has a mass of 10.012938 and a relative abundance of 19.80 percent. The other isotope has a relative abundance of 80.20 percent. What is the mass of the two isotopes?

What type of radiation is most likely to damage DNA? A. ionizing B. non-ionizing

Water vapor cools and comes together to form a cloud. This is an example of what change in state? condensation evaporation melting