chemistry - atoms and elements test

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how to find atomic number

number of protons

how to find atomic mass

protons + neutrons

charge of proton

positive

charge of neutron

neutral

charge of electron

negative

JJ thomsons models

proposed the existence of electrons within a positively charged 'plum pudding' model of the atom, this model of the atom has positive and negative charged particles in a random arrangement.

rutherfords model

described the atom as having a small, dense, positively charged nucleus surrounded by orbiting electrons, leading to the nuclear model of the atom.

daltons model

proposed that all matter is made of indivisible atoms, which are solid, spherical particles, and that atoms of different elements have different masses and properties.

bohrs model

proposed that electrons orbit the nucleus in fixed paths or energy levels, with quantized energy states, explaining atomic stability and spectral lines.

isotope

variants of a chemical element that have the same number of protons but different numbers of neutrons, resulting in different mass numbers.

ions

atoms that have gained or lost one or more electrons, resulting in a net electric charge.

electron clouds around the nucleus

schrodingers model

cation

a positively charged ion formed when an atom loses one or more electrons.

anion

a negatively charged ion formed when an atom gains electrons.