Scientist use their knowledge of the half-life of carbon and uranium isotopes to measure the age of the rock or fossil .

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

What rule is used to determine how many covalent bonds an element can form? a. the number of covalent bonds is equal to six c the number of covalent bonds is equal to five minus the group number plus the group number b. the number of covalent bonds is equal to eight d. none of the above minus the group number select the best answer from the choices provided

What is the formula of the ionic compound composed of calcium cations and chloride anions