What do all hypotheses have in common?

A - They are proposed at the beginning of the scientific process

B - They are tested by experimentation

C - They are rejected due to growing evidence

D - They become accepted scientific knowledge

Does sugar evaporate in water? for science fair project!

How do you balance __Mg + __HCl - - > __MgCl2 + ___ H2

What are the products of the double-replacement reaction between potassium bromide and silver nitrate? Name the resulting compound (s).

Which of the following is smaller than the atomic radius of beryllium? a. the ionic radius of beryllium b. the atomic radius of lithium c. the ionic radius of carbon d. the atomic radius of magnesium

Which products were produced or raised in large amounts on the prairie? Choose all answers that are correct. A. Corn B. Tabaco C. Cattle D. Wheat

Luis set a glass of ice water out side is the sunshine. when he looked at the glass 10 minutes later, the contents had changed. what kind of change happened to the ice water? A. evaperation B. conduction C. chemical change d. sudden change

A substance is considered to have a smaller surface area when ... A. it is a fine powder B. it is in large chunks C. you have a small amount of the substance D. you have a large amount of E. the substance

Which is the noble gas notation for chlorine? A-[Ne] 4s2 4p5 B-[Ne] 3s2 3p5 C-[Ne] 3s2 3p3 D-[Ne] 3p2 3p5

Is argon long hand or noble gas

Lithium, beryllium, and boron are elements with atomic number 3, 4, and 5, respectively. Even though they are three of the five simplest elements, why are they rare compared to many heavier elements?