# of Protons; # of Electrons # of Protons plus Neutrons BELL WORK! Review your notes. 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 # # of Protons; # of Electrons Mass # # 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. Group 1 Alkali Metals Underneath: Most Reactive Metals

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

Grouping the Elements…Transition Metals Outline the lanthanides yellow. Outline the actinides dark blue. Lanthanides Actinides

Grouping the Elements…Metalloids Draw the metalloid zig zag line red. Metalloids

Grouping the Elements…Boron Group Label this group. Group 13 Boron Group Underneath: 3 valence electrons

Grouping the Elements…Carbon Group Label this group. Group 14 Carbon Group Underneath: 4 valence electrons

Grouping the Elements…Nitrogen Group Label this group. Group 15 Nitrogen Group Underneath: 5 valence electrons

Grouping the Elements…Oxygen Group Label this group. Group 16 Oxygen Group Underneath: 6 valence electrons

Grouping the Elements…Halogens Color the halogens green. Group 17 Halogens Underneath: Most Reactive Nonmetals

Grouping the Elements…Noble Gases Color the noble gases orange. Group 18 Noble Gases Underneath: Unreactive

Question #1: Alkali Metals (Group 1) What are the most reactive metals? Alkali Metals (Group 1)

Question #2: What group is unreactive? Noble Gases (Group 18)

Question #3: How many electrons does Magnesium have? 12

Question #4: How many neutrons does Beryllium have? 5

Question #5: How many valence electrons does Sodium have? 1

Question #6: The black circles in the Bohr model above represent neutrons. What do the white circles represent? Protons

Question #7: What element is this? Beryllium

Question #8: How many protons does an atom have with an atomic number of 23 and a mass number of 51? 23