Atomic Structure v.2

Dalton’s theory model + draw

indivisible featureless spheres

The plum pudding model is who’s f******* model!?!?!?

B******** Thomson

Thomson’s theory model + draw

positive sphere with imbedded electrons and a net charge of zero

Nagaoka’s theory model + draw

positive sphere with a ring of electrons

Rutherford’s theory model + draw

a small dense positive nucleus surrounded by electrons

what two things did the gold foil experiment prove?

1. Proved Thomson’s model incorrect

2. Proved the existence of nucleus

Explanation of Gold foil experiment + expected what + what actually happened

Radioactive alpha particles fired at gold foil; slight deflections; large deflections

Bohr’s theory model + draw

magic number of electrons in quantized energy levels

Quantum mechanics theory model + draw (H atom)

electrons in probability orbitals (wave patterns)

The atom is …

the fundamental building blocks of all matter

The nucleus is composed of …, and each element’s nucleus has a …

protons and neutrons; specific number of protons.

The proton relative charge, mass and location

+1, 1, nucleus

The neutron relative charge, mass and location

0, 1, nucleus

The electron relative charge, mass and location

-1, 1/1837, cloud surrounding the nucleus

The atomic number is …

the number of protons in the nucleus of an atom.

In neutral atoms the number of electrons and protons are …

equal

When an atom loses or gain an electron it becomes an …

ion

Mass number definition

The sum of protons and neutrons in an atom

Isotope definition

Same number of protons different number of neutrons

Atomic mass definition

The weighted average of various naturally occuring isotopes

Electrons in the Bohr’s model can only have …, which are given a …

certain energies; number (n) 1,2,3, etc

Each energy level (in Bohr’s model) can hold … electrons.

2n²

Nobel gases are very …, and form …

stable; few compounds

Most noble gases have … electrons in their outer most shell. Except for …

8; Helium

Halogens or Group 7 have … electrons in their outer most shell

7

Halogens react with … and … to form …

metal; hydrogen; halides

The period the element is in represents …. For example Carbon is in period 2, so it have …

energy levels in the element’s atom; two energy levels

The group the element is in represents …. For example Carbon is in group 4, so it have …

the numbers of electrons in its outermost shell; 4 electrons in its outermost shell