Elements on the periodic table are grouped by their

A) Alloys

B) Electrons

C) Names

D) Properties

A hemisphere represents what part of a sphere? 1/4 1/2 3/4 whole

An engineer is trying to create a fast reaction in a fuel mixture. Which should she do? A. Decrease the amount of fuel B. Lower the temperature of the engine C. Add a catalyst to the fuel mixture D. Lower k for the fuel reaction

Which term is defined as the region in an atom where an electron is most likely to be located

Two students fertilize a pair of pea plants. One plant is Rr, and the other is rr. The offspring produced b all had the dominant trait. The Punnett square showed that there was a 50 percent chance of the offsp genes.

How are elements identified in terms of their atoms

If the amount of atoms of each type on the left and right sides of a reaction differ, what must be done to balance it? A. It should be left alone B. Coefficients are placed in front of the reactants and/or products C.

All metals a melt at high temperatures b conduct heat and electricity c contain iron d react with air and water

Predict the following chemical formula for a compound between calcium and chlorine.

Two pieces of silk have an electric charge after being rubbed on a piece of amber. What will happen when the two silk pieces are brought close together? A. They will repel one another. B. They will attract one another. C.

The chemicals formula of glucose is c6h12o6. what are the names of the elements in glucose and how many atoms of each element are present in glucose molecules