Which of the following elements has seven valence electrons?

N

Cl

Fr

Ar

How do you find electronegativity

What happens to energy during a phase change

A chemical reaction produces two new substances, one with a mass of 34 g and the other with a mass of 39 g. What is the total mass of the reactants?

When two hydrogen atoms bond with one oxygen Atom to form water what happens to the electrons

What does continental drift and sea floor spreading have in common

Coefficients in a chemical equation are used to: balance the number of atoms on both sides of the equation ensure that all subscripts on both sides of the equation are the same indicate energy changes that occur during the reaction indicate the type

What determines your blood cholesterol level?

Describe two ways that water moves through earthy atmosphere in the water cycle.

which of the following questions can use science as a method of inquiry? a. is cloning appropriate b. how can we protect crops from drought c. why is jazz a great type of music d. did dinosaurs exist

How many moles of CO will be produced, if 32.5grams of H2O are produced? C6H6S+6O2=>6CO+3H2O+SO3