What is the definition of a covelant bond?

A. a bond between two positive ions.

B. a bond between two negative ions.

C. a bond between a positive and negative ion.

D. a bond between two atoms

Which is a drawback of agricultural technology? A. More food is produced B. Some dangerous chemicals are used. C. Some pests are used D. People can communicate better.

How many picograms are in 1 mg? In 35 ng?

What energy conversion occurs when a plant uses energy from the sun to make sugar stored in fruit?

Here are some densities computed by a student doing this laboratory experiment. Rock Water Wooden block 3.34 g/cm3 1.00 g/cm3 0.495 g/cm3 The student noticed that the rock sank in water.

A magnet moved near a coil of wire can cause a (n) to flow. A. electric current B. protons c. magnetic field D. neutrons

Why do magnesium and oxygen combine?

When a chemical reaction takes place, the number of atoms of each element in the reactants

A scientist is measuring the pressure that is exerted by each of the following gases in the atmosphere: carbon dioxide, oxygen, and nitrogen. Which term most likely describes what she is measuring?

How would you expect energy to change during a chemical reaction? A. Energy will be increased. B. Energy will be decreased. C. Energy will be converted into another form. D. Energy will be consumed.

In the formula for the compound xcl4 the x could represent