Which if the following elements has atoms with the least amount of valence electrons

1. k

2. Ca

3. O

4. Mg

5. C

How do you calculate if an object will float, sink, or neither given the density of the object and the fluid?

A bar of Sam's coconut oil soap has a mass of 132 grams. The rectangular bar is 8 centimeters long, 6 centimeters wide, and 2.5 centimeters high. How many grams per cubic centimeter ia there? Calculate the density of Sam's coconut oil soap.

Explain why potassium chloride has the formula KCl, but potassium oxide is K2O (5)

Carbon is transferred from seawater to atmosphere through the process of A. diffusion B. excretion C. photosynthesis D. respiration

What factors determine whether a chemical reaction is spontaneous or not? Select all that apply. A.) potential energy B.) mechanical energy C.) kinetic energy D.) heat E.) entropy

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical

Select all of the characteristics that define matter. A.) Matter has mass. B.) Matter has volume (takes up space). C.) Atoms and compounds are made out of matter. D.) All matter has the same density.

The science of observing and forecasting weather conditions is called