What is true of valence electrons?

a) They exist in the outer orbital.

b) they easily move from one orbital to another

c) they have difficulty moving from one orbital to another

d) they are always the lowest energy electrons of the atom

Which of the following is not a monosaccharide? A. glucose B. fructose C. galactose D. sucrose

What is the meaning of autotrophs

Hydrogen, oxygen, and chlorine are some of the ___ elements

Compare the intermolecular forces, dipole-dipole and hydrogen-bonding. What would you suggest is the biggest different between them? A. Dipole-Dipole forces do not affect the properties of a substance as much as hydrogen-bonded forces do. B.

A block of material has a volume of 2 m3. It has a mass of 1 * 104 kg. Calculate the density of the material sample and express your results in g/cm3 with appropriate scientific notation.

Which term best describes the type of bonding in magnesium chloride

This equation indicates that the reaction gives off heat. What is this type of reaction called? 2C4H10 + ? O2? 8CO2 + 10H2O + heat a. an exothermic reaction b. an endothermic reaction c. absorption reaction d. precipitation reaction

Given the balanced equation representing a reaction: C3H8 (g) + 5O2 (g) = = >3CO2 (g) + 4H2O (g) What is the total number of moles of O2 (g) required for the complete combustion of 1.5 moles of C3H8 (g) ? (1) 0.30 mol (3) 4.5 mol (2) 1.5 mol (4) 7.

What increases in equal steps of one from left to right in the Periodic Table for the elements lithium to neon?

The organisms living together in a community are interdependent upon one another. Look at the food web below. In which of the following ways is a puffin dependent upon salmon? A. Puffins have a commensalistic relationship with salmon. B.