Chemistry Unit 2 questions 1-3

Planets in the Goldilcks zone . . .

• can have liquid water

• Have bears

• are not too hot or too cold

• have a porridge-like consistency

The loest energy state or position of an elecrtron (the "normal" configuration) is called the ______state.

In the _______state, one or more electrons are in a higher than normal energy level.

In the _______state, one or more electrons are in a higher than normal energy level.

Which is true of the Bohr model of an atom?

• It shows the electrons' relative positions in rings to represent what energy level they are in.

• It shows the electrons' relative positions in rings to represent what kind of element it is.

• It shows the electrons' relative positions in dots to represent their energy level.

• It doesn't show the exact number of electrons--only how many rings there are.

Prisms bend light because

• the different colors of light have different wavelengths

• the different colors of light have different electrons

• The different colors of light move at different speds

• The different parts of the prism have different densities

We can tell what elements are in stars by looking at the stars' line ______

Which of the following show molecules of life?

• phospholipids

  membrane proteins

  nucleic acids

• carbohydrates

  enzyme proteins

  metal ions

• spectra proteins

  metal ions

  nucleic acids

• phospolipids

  membrane acids

  enzyme ions

Why is carbon called the backbone of life?

• It can build multiple bonds in multiple directions, so it can make many of the molecules necessary for life

• It builds a unique bond in only one direction in a way that is necessary for life

• It makes up most of the backbone

• Most living things contain carbon

Which are the six most common elements of life?

• Carbon

  Helium

  Nitrogen

  Oxygen

  Phosphorus

  Sodium

• Carbon

  Hydrogen

  Nitrogen

  Oxygen

  Phosphorus

  Sodium

• Carbon

  Hydrogen

  Nitrogen

  Oxygen

  Phosphorus

  Sulphur

• Carbon

  Helium

  Nitrogen

  Oxygen

  Phosphorus

  Sodium