Which of the following bonds is the strongest?

a

K-K

b Mg-mg

c

Na-Br

d

N-N

e

H-N

In the Investigate, you observed what happened to two pats of butter when the handle of a metal knife was placed in hot water. What conclusion can you draw about how the heat moved through the knife?

How many protons does a 17CI have

Children's reactions to divorce often include which of the following groups of behaviors?

The d-block elements are known as

The Mendeleev and Moseley periodic charts had gaps for undiscovered elements. Why do you think the chart used by Moseley was more accurate at predicting where new elements would be placed?

Which statement regarding water is true? Energy must be given off in order to break down the crystal lattice of ice to a liquid. Hydrogen bonds are stronger than covalent bonds. Liquid water is less dense than solid water.

Which of the following elements has the fewest valence electrons?. a. beryllium. b. boron. c. carbon. d. lithium

How many molecules are in 4.50 moles of H2O? A. 450 molecules B. 6.02 x 1023 molecules C. 2.71 x 1024 molecules D. 3.00 molecules

A sample of pure calcium fluoride with a mass of 15.0 g contains 7.70 g of calcium. How much calcium is contained in 45.0 g of calcium fluoride

If the mass of a material is 111 grams and the volume of the material is 11 cm3, what would the density of the material be?