What is the atomic number of an element

The process that makes ice cubes shrink as they sit in a freezer is called: A - Sublimation B - Condensation C - Freezing D - Boiling

Which are ways to improve the design of this experiment? Check all that apply. -Reduce the sample size so the experiment can be done faster. -Increase the sample size from 6 cups to 12 cups of sand and water.

Which two elements have the same number of valence electrons? A.) Na and Sr B.) Zr and H C.) O and S D.) Mg and P

Calculate the mass in atomic mass units of 0.25 mol of carbon-12 atoms

Which if the following is true about scientific theory? a. A theory is a proposed explanation for a hypothesis b. A theory can be formed after a single experiment c. A theory can be changed to explain new observations or experimental results d.

How many milliliters of 2.55 m naoh is needed to make 125 ml of 0.75 m naoh solution?

Describe the scientific method and it's four steps.

Why can a magnet separate iron and sulphur in a mixture but not a compound?

Which organisms can reproduce through budding? bees strawberry plants ants sponges

Separates substances based on their movement through a special paper