Which statement is true?

a

Atoms can be changed

b

All atom are not stable

c

Atoms can never be changed

d

Both A and B

A wood block, 22.00 cm x 13.20 cm x 4.400 cm, has a mass of 1600.0 g. The density of the wood in SI units is:

an element has an atomic number of 99. the number of protons and electrons in a neutral atom of the element are

What color does potassium burn

A chemist examines two compounds. Both are clear, odorless liquids. Which of the following would not indicate that a chemical change has occurred when the two compounds are combined? The product remains odorless but turns blue.

What's an example of a slow and a fast chemical reaction?

Aluminum and Oxygen gas will react to form Aluminum Oxide (Al2O3). When the equation is balanced, How many moles of Al2O3 are formed when a mixture of 0.36 moles Al is ignited? a. 0.12 b. 0.18 c. 0.28 d. 0.46

Which state of the West produces the widest varieties of fruits, vegetables, and nuts? A) California B) Colorado C) Wyoming D) Alaska

A chemical engineer for a fertilizer company is determining the most efficient way to produce ammonia. the engineer carries out the haber reaction under four different conditions.

What type of Bond exist in a molecule of hydrogen Iodide

Which common material is an example of a polyamide?