Scientific Investigation
Types of Elements
Reactivity and Bonding
Counting Atoms
Atomic Properties
100
I water my plants with tap, filtered, and bottled water to see how tall they will grow. What is my independent and dependent variables?
Independent: type of water
Dependent: plant growth
100
What type of element is Hydrogen (H) ?
Nonmetal
100
Atoms want ______ valence electrons.
8
100
How many elements are in 2H2O ?
2
H and O
100
This tells you the number of protons in an atom
Atomic Number
200
I feed my cat different types of food every night for a week, to see which will help her sleep the best.
What are my independent and dependent variables?
Independent: types of cat food
Dependent: restful sleep
200
What type of element is Tin (Sn) ?
Metal
200
Group ___, the ___________ Metals, are the most reactive metals!
Bonus if you can tell why!
1, the Alkali Metals.
It is easy for them to get rid of that 1 valence electron!
200
How many atoms are in H2O?
3
H = 2, O = 1. 2 + 1 = 3
200
This tells you the number of protons + neutrons (weight) of an atom
Atomic Mass
300
How does time affect temperature in this graph?
As time increases, temperature increases.
300
What type of element is Silicon (Si)?
Metalloid
300
Group _____, the _______, are the most reactive nonmetals.
Bonus points if you can tell why!
17, Halogens
They only need one more valence electron!
300
How many elements are in Fe(OH)3 ?
3
Fe, O, and H
300
The Group number (column) tells you how many _________ _________ are in an atom.
Valence Electrons
400
Which passenger belongs on dot 5?
Dennis
400
What type of element is Argon (Ar) ?
Nonmetal
400
_____________ Bonds are when a metal gives an electron to a nonmetal.
Ionic
400
How many atoms are in 2Fe(OH)3 ?
14
Fe = 2
O = 3x2
H = 3x2
2 + 6 + 6 = 14
400
The Period number (row) tells you how many ________ ____________ an atom has.
Energy Levels
500
Which length of worm is most common?
6.5 cm to 7 cm
500
Metals are to the _______, nonmetals are to the _______, and metalloids are found _______ the stairstep line.
Left, right, on/touching
500
_________ Bonds are when two nonmetals share electrons.
Covalent
500
How many elements, and atoms, are in Al2(SO4)3 ?
3 elements (Al, S, O)
17 atoms
Al = 2
S = 3
O = 4x3 = 12
500
Complex atoms have (more / fewer) protons, and are located towards the (top / bottom) of the periodic table.
More, bottom