Date a rock using half life

An atom is said to be in an excited state when it possesses more energy than when it is in its ground state. True or false?

Which element is most chemically similar to chlorine? Ar F Fr S

Which of the following statements is true? A. Stars that appear to move very much are very far from earth B. The more a star appears to move, the farther is it from earth C. Stars that do not appear to move are very close to earth D.

Which of the following can be seen as a result of the Earth's tilt?

A ball rolling across the ground in Death Valley will slow and eventually stop. Why? - the ball's kinetic energy evaporates. - the ball's force is destroyed. - the friction of the ball changed the force to negative ions.

When does a spring tide take place? At the beginning of spring Only during the spring season Only after spring is over At any time

The highest cloud are known as

What is the mass of 4.85 X 10^22 atoms of iron (Fe) ?

If element x has 95 protons how many electrons does it have

Which of the following when dissolved in deionized water would make a good conducting solution? a) methanolb) sugarc) baking soda