How many elements in the periodic table

Which of the following is true about mixtures and compounds? A compound forms when different substances chemically combine to form a new substance. A mixture contains different substances that are not chemically combined with one another.

What does the periodic law allow us to do?

Place ½ teaspoon of baking soda in each large container. If the baking soda is lumpy, first place it on a small plate and use the back of a spoon to break up the lumps. Why is it important to break up the lumps?

What is the name of S2Br6

True or false the force of attraction that holds two atoms together is called a chemical bond This is for science

How would non secretion of of saliva effect digestion of food in the mouth.

Which of the following is insoluble in water? a." (NH) SO b. Na so c. Maso d. ZnSO e Baso

What is the difference between a root word and a combining form? List 2 examples of combining form

What is the octet rule and how does it explain the formation of ionic compounds?

Can somebody explain step by step how to solve decomposition reactions?