Composition of an Atom

Front

Atomic structure

Back

the composition of an atom, which consists of a tiny, positively charged nucleus containing protons and neutrons, surrounded by a cloud of negatively charged electrons that orbit around the nucleus

Front

Bohr model

Back

• - electrons are order into shells based on energy levels

• -energy is quantized and exists in quantas

Front

Isotopes

Back

different types of the same element; same amount of PROTONS and DIFFERENT amounts of NUETRONS

Front

Why did Mendeleev organize the periodic table the way he did?

Back

arranged elements in rows by increasing atomic mass

Front

Groups on the periodic table

Back

numbered 1–18 from left to right

Front

Trends on the periodic table (long)

Back

increasing ionization energy moving across a period (left to right), decreasing ionization energy moving down a group, increasing electronegativity across a period, decreasing metallic character moving across a period and increasing metallic character moving down a group

Front

valence electron

Back

the electrons located at the outermost shell of an atom

Front

ion

Back

an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.