Atoms & Periodic Table

also called “Families”; labeled by a number at the top of the column

Three main groups are

The periodic table has mostly

The most common element in the universe

most living things are composed of 25 atoms-

not certain where the electron actually is at any point in time- cloud like

horizontal rows in the periodic table; 7 of these...

Electron move in shell or orbitals

The number of protons is equal to

How many protons does F ( flourine ) have?

metals conduct electricity, metalloids have properties of both, and nonmetals

came up with Atom (atomos- indivisible), no specific shape for the atom

The number of electrons in a stable atom is equal to

The center of the atom (where the red and blue dots) are is called the

Elements that have different number of neutrons are_____ and written _____

Mendeleev’s arranged by ______ and the Modern Day table is arranged by ______

said atoms are spheres

An atom with 3 protons and 2 electrons will

If an element is in the 3rd period it will have

The number of neutrons is equal to

Planetary Model; has a (+) nucleus and (-) outside nucleus

Plum Pudding Model (choc. Chip cookie) has (+) and (-)

When an atom gains or loses an electron