Atoms
The smallest unit of an element that still has the original properties of the element
Atom
F, Cl, Br, I have _____________ atomic numbers
increasing
Subatomic particle that has no charge
neutron/neutral
Vertical column on the periodic table is the
Group
Chlorine is in the same group as this element that begins with an F
Fluorine
Protons, Neutrons, and electrons are all
subatomic particles
Sr, Ca, Mg, Be have increasing or decreasing atomic numbers
decreasing
Protons and neutrons are tightly packed in the
nucleus
Horizontal row in the periodic table
Period
Shares properties with Neon and starts with a K
Subatomic particle that is positively charged
proton
Chart that organizes all known elements
Periodic Table
The region surrounding the nucleus
electron cloud
Groups are also called this because they share similar properties and have the same valence number of valence electrons
Families
Shares properties with Beryllium. Starts with a C
Calcium
Subatomic particle that is negatively charged
electron
The periodic table is organized by
Atomic number
far
Substances that can be bent and shaped easily
metals
Nitrogen shares the most chemical properties with this element that starts with a P
Phosphorus
Electrons are so tiny that they are not counted as
atomic mass of the atom
Atomic number is the same as the number of
protons
What do scientists modify when there is new evidence
Theories
Argon is on the right side of the periodic table. It is a
non metal
Theories are not always tested in a
Lab