Chemistry - Quiz 1: Golden years to masters

Which statement is true?

1. Isotopes of a given element have very similar chemical properties.

The element 238 YOU 92 has how many neutrons?

146

Match these items. Match the items in the left column to the items in the right column. 1. Bohr 2. electrons 3. J. J. Thomson 4. Dalton 5. Rutherford 6. nucleus 7. Chadwick

2 = emitted from a cathode-ray tube 7 = discovered the neutron 3 = discovered the electron 1 = postulated the quantum atom 5 = discovered the proton 4 = father of atomic theory 6 = location of most of the mass of the atom

The element 108 AG 47 has how many protons?

47

A gamma ray is a very high speed particle with no charge.

False

The man responsible for discovering that the atom is mostly space is:

Rutherford

An alpha particle is:

a nucleus of helium

The true statement concerning the atomic nucleus is:

it contains most of the mass of the atom

A false statement concerning matter is:

matter cannot be subdivided

Rutherford coined the term used for the simplest positive charged particle and called it the:

proton

The atomic number of an atom is equivalent to the number of:

protons

Rutherford and Soddy's theory:

stated that uranium successively disintegrated to lead

When do electrons emit energy?

when moving to a lower orbit