An element is a pure substance. It can not easily be broken down into parts by physical means.

A) True

B) False

What best describes the kinetic energy of two gas particles before and after a collision? Select one: a. The kinetic energies of both particles stay the same b. The total kinetic energy of the two particles stays the same c.

Which statement is NOT true about the elements flourine, chlorine, and iodine? a) they are all halogens b) They react easily with metals c) They are similar to noble gases d) They are all nonmetals

How do you know if a element is neutral?

A drought is a long period of dryness. If animals fight during a drought, which basic need is most likely limited?

1) According to Bohr's model of the atom, in which orbitals do electrons have the most energy? A. innermost orbitals B. outermost orbitals C. middle orbitals 2) Where are valence electrons located? A. closest to the nucleus B.

Carbon atoms stick to catalyst surface in craking processes? 1 - sintring 2 - poising 3 - aging 4 - cocking or fouling

What is the oxidation number of Cl in chlorate ion ClO3?

An atom with one valence electrons combines with an atom with seven valence electrons what is likely to happen to the atom with one valence

How many Joules are there in 55 nutritional calories?

What is the half-life (in seconds) of a zero-order reaction which has an initial reactant concentration of 0.834 m with a k value of 5.42 * 10-2 m/s?