For elements 1-20, we can use the periodic table to predict.

A) An elements color

B) The number of valence electrons an element has

C) The number of isotopes an element has.

Why is the ability of apple snails to survive an increase in the salinity of water considered an adaptation

How much uranium was used in the first atomic bomb?

You have a racemic mixture of (+) - 2-butanol and (-) - 2-butanol. the (+) isomer rotates polarized light by + 13.5∘. what is the observed rotation of your mixture?

Prefix meaning "ring-shaped"

Brownian motion is not observed in a mixture that includes two phases. Which best identifies the mixture?

Why does the body of the bird covered with feathers?

One molecule of caffeine contains 8 atoms of carbon, 10 atoms of hydrogen, 2 atoms of oxygen, 4 atoms of nitrogen. write the formula for caffeine with the elements in the order they are given.

A piece of magnesium metal is heated in the presence of chlorine gas, and a reaction takes place. What compound will most likely be produced? A. Mg2C1 B. MgCl3 C. MgCl2 D. MgCI

What is the pressure of the gas in this mercury manometer if h = 81 mm and atmospheric pressure is 749 mmHg

A microscope containing two or more lenses is an