What type of reaction is this?

2Na (s) + Cl2 (g) - > 2NaCl (s)

Conservation of Mass means: A. Mass is gained in a chemical change B. Mass is lost in a chemical change C. Total mass of the chemicals doesn't change in a chemical change D. Change in total mass depends on the type of chemical change

Which of the following is a nonmetallic mineral resource?. A. wood. B. iron. C. coal. D. aggregate

Whats the relationship between the temperature and the density of a substance

How do valence electrons relate to cation formation?

In two or more complete sentences describe how atomic radius changes as you move across a period in the periodic table and why.

Which organelles are unique to plant cells? chloroplasts mitochondria vacuoles nuclei

An atom that has 13 protons and 15 neutrons is an isotope of the element? How can I count it?

Which element is nuclear fusion least likely to produce? hydrogen, which has an approximate mass of 1 chlorine, which has an approximate mass of 35 argon, which has an approximate mass of 39 silicon, which has an approximate mass of 28 I know the

How deep does the surface current known as the Gulf Stream go A. 3,000 meters B. 3 meters C. 300 meters

What characteristics of a planet determine the strength of its gravitational force on other objects? A. diameter of the planet and its location in space B. the number of moons that the planet has C.