A chemical reaction, where more energy is released than is needed to get the reaction started, is called?

A)

A really amazing reaction

B)

Endothermic

C)

Exothermic

D)

Non-reactive

Which of the following pairs of elements is most likely to form a covalent bond? A. Sodium and chlorine B. Magnesium and Oxygen C. Phosphorus and Bromine D. Copper and Oxygen

What are the various adverse effects of chemistry

Order the following from smallest to largest Atom, Electron, Quark, Proton, Neutron, Molecule, Nucleus

If you roll a ball down a ramp, which factor will have the greatest effect on the amount of friction created? (a) Force applied to the ball (b) Speed of the ball (c) Texture of the surface (d) Weight of the ramp

Is cesium a cation or anion?

Every water molecule has two hydrogen atoms bonded at one oxygen atom. This fact supports the concept that elements in a compound are

What is the mass of 9 atom (s) of copper in grams?

Andy has two samples of liquids. Sample A has pH of 4, and sample B has a pH of 6. what can Andy conclude about these two samples? Sample A is a neutral b alkali c acidic Sample B is a neutral b alkali c acidic

How does a lone pair contribute to molecular shape? A. It is too small to affect the molecule's shape. B. It takes up space like an "invisible" atom. C. It forces the molecule into a tetrahedral shape. D. It lets the bonding pairs spread out more.

The are of a rectangle is 12 in^2. what is the area in cm^2. there are 2.54cm in an inch.