Which statement about elements is not true

A. Elements are found on the periodic table

B. Elements are made up of w

C. Elements are made up of atoms

D. Elements naturally exist on earth

Sodium chloride as a compound does not truly exist in the ocean. True or False

From the following balanced equation, 4NH3 (g) + 5O2 (g) ⟶4NO (g) + 6H2O (g) how many grams of H2O can be formed from 6.12g NH3?

Which criterion is used to arrange the elements in columns on the periodic table?

Some baker of sourdough and a few other types of bread have what they call "starter dough". This dough contains yeast from which they make all their bread. Some starter dough is more than 100 years old.

Ammonia can be made from the reaction N2 (g) + 3 H2 (g) 2 NH3 (g). The reaction quotient is Q = 4.50 x 10-4 and Keq = 6.02 x 10-2. What statement can be made about the reaction? A. The reaction is at equilibrium and will keep constant concentrations.

Model describe how you would show j. j. thomson's model of the atom using small beads and clay

Switching one substance for another is called ... ? a) displacement b) synthesis c) decomposition d) oxidation

C2h4 + O2 - CO2 + H2O If we start with 20 grams of CH4, how many moles of CO2 will form?

How does chemical energy relate to the atom and how can we use it?

A positively charged atom is known as a cation. A cation will? ... A) have more protons B) have to same number of protons and electrons. C) Be the same as a neutral atom. D) have more electrons.