Which is a characteristic of an Atoms

1. They come in 10 major types

2. They are smallest Unit of matter

3. They can be divided

4. They cannot combine together

Which of the following statements about subatomic particles best characterizes neutrons? A-positive charge, heavy, found in the nucleus B-no charge, heavy, found in the nucleus C-negative charge, light, circling the nucleus D-positive charge, heavy,

Which of the following chemical formulas shows a covalent compound? A. CO2 B. MgO C. NaCl D. HBr

100mg magnesium reacts with 20ml of 1.0M hcl

Why are hydrogen bonds important for the properties of water?

A bird could be both a consumer and a producer

Can magnetism be used to identify a substance

Nitrogen dioxide dimerizes to give dinitrogen tetroxide: 2NO2 (g) → N2O4 (g). At 298 K, 12.55 g of an NO2/N2O4 mixture exerts a pressure of 0.963 atm in a volume of 6.92 L. What are the mole fractions of the two gases in the mixture?

What is the concentration of a solution, in gsolute/100gsolvent, made using 2.83 g of KNO3 in 2.03 g of H2O? Do not include units in your answer.

Why does pressure change in this way? Select all that apply.

Will platinum (pt) metal react with a lead (ii) nitrate solution?