An atom of silicon has a mass number of 28 and an atomic number of 14 how many electrons does this atom have

Which of the following describes the formation of an ionic bond?

The nuclear product of radioactive decay is called the_ o parent nuclide o mass defect o half life daughter

What evidence would support Maria's claim that the fossilized remains are that of a bird, class Aves, instead of a turtle, class Reptilia? A) the eggs B) a backbone C) a keeled sternum D) warm-bloodedness

What applies to the collision theory? -Particles need to collide in order to react. -Particles may obtain successful collisions in any molecular orientation. -Temperature increase causes kinetic energy of particles to decrease.

What is the molar volume of a gas at standard temperature and pressure

Why must you wear safety glasses at all times

How do you classify solutions as acidic, basic, or neutral?

Which statements describe abiotic factors in an environment?

A ball rolling across the ground in Death Valley will slow and eventually stop. Why? - the ball's kinetic energy evaporates. - the ball's force is destroyed. - the friction of the ball changed the force to negative ions.

Calculate ∆h0 for the following reaction. br2 ( g. → br2 (l) ∆hf0 br2 ( g. = 30.91 kj/mol; ∆hf0 br2 (l) = 0 kj/mol)