What gives elements in a family or group similar properties?

a. the same atomic mass

b. the same number of protons in their nuclei

c. the same number of electrons in their outer energy level

d. the same number of total electrons?

In what phas do molecules only vibrate and stay in one place. A. Gas B. None C. Liquid D. Solid

Which of the following is an example of a barrier to entry

Why is it necessary to mix the solution very rapidly when the bleach is added?

How does the motion of the particles change when thermal energy is added?

What do α helices and β sheets have in common? The same amino acids stabilize both forms of secondary structure. Both are stabilized by glycine and proline residues. The lengths of a 10 amino acid α helix and β sheet strand will be the same.

Which material best absorbs sound waves in a room? a. heavy curtains b. hardwood floors c. brick walls d. cement floors

Does density of water depend on the amount of water present?

Which of the following air fronts does not move? a Occluded front b Cold front c Stationary front d Warm front

Kwame wants to measure the volume of water contained in a disposable foam coffe. Which should he use? Nanoliters? Milliliters? Or liters?

Which of the following changes the solid Earth the most?