BELL WORK Review your notes from before winter

BELL WORK! • Review your notes from before winter break. • Make sure you know the difference between the mass number and atomic number. • Also, you should know how to tell how many protons, neutrons, and electrons an atom has. Atomic # Mass # # of Protons; # of Electrons # of Protons plus Neutrons

This is what we know… • Everything is made of atoms. • Atoms are the smallest thing that still resembles that thing. • Atoms are made up of protons, neutrons, and electrons. • Electrons are the smallest and are outside the nucleus on electron clouds. They have a negative charge. • Protons and neutrons make up the mass number and are inside the nucleus. Protons are positive.

The Periodic Table Chapter 11

Grouping the Elements… Let’s make an interactive periodic table. Metals get less reactive as you go right.

Grouping the Elements… Let’s make an interactive periodic table. Group 17 is the most reactive nonmetals.

Grouping the Elements… Color the square for hydrogen yellow. Hydrogen

Grouping the Elements…Alkali Metals Color the alkali metals red. Alkali Metals Group 1 Underneath: Most Reactive Metals

Grouping the Elements…Alkaline-Earth Metals Color the alkaline-earth metals purple. Alkaline-Earth Group 2 Underneath: Very Reactive Metals

Grouping the Elements…Transition Metals Color the transition metals blue. Groups 3 -12 Transition Metals Underneath: Metals that do not give up their electrons easily