Chapter 2 Questions

Isotopes

Atoms that vary in the number of neutrons found in their nuclei are called ________.

Cation

If a molecule lost an electron, what is it?

54

If xenon has an atomic number of 54 and a mass number of 108, how many neutrons does it have?

8

Oxygen has an atomic number of 8, how many electrons does t need to make it neutral?

1,2,3 full and 4 has three.

Potassium has an atomic number of 19. What is its electron configuration?

Ionic bonds are strong bonds, but are weaker than covalent bonds.

What makes ionic bonds different from covalent bonds?

Carbon is unique and found in all living things because it can form up to four covalent bonds between atoms or molecules.

What property of carbon makes it essential for organic life?

Covalent

what type of bond shares electrons?

six, and seven

How many neutrons do carbon-12 and carbon-13 have, respectively?

Buffers absorb the free hydrogen ions and hydroxide ions that result from chemical reactions.

Discuss how buffers help prevent drastic swings in pH

hydrogen bond

Which type of bond represents a weak chemical bond?

Because of the surface tension of water caused by cohesion.

Why can some insects walk on water?