Atoms, elements and compounds
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Items in this lesson
Slide 1 - Slide
Match the word to the definition.
The smallest part of an element to exist.
2 or more atoms strongly joined together.
A substance made from one type of atom.
Atoms of 2 or more elements strongly joined together.
Compound
Atom
Molecule
Element
Slide 2 - Drag question
How many oxygen atoms are there in each of these substances?
Substance
Oxygen Atoms
O
HNO
C H O
MgO
CO
MgCO
2
2
3
3
6
12
6
1
2
2
3
3
6
Slide 3 - Drag question
In a chemical reaction atoms are always _________________ to make new __________.
However the total number of atoms in the reactants must be _____________ the total number of ____________ in the products.
rearranged
reactants
atoms
less than
equal to
products
more than
Slide 4 - Drag question
the smallest particle you can chemically break a substance into
made of only one type of atom
two or more atoms chemically bonded together
two or more substances mixed together but not chemically bonded
two or more atoms of different elements chemically bonded together
Match the keyword to their definitions
mixture
compound
molecule
atom
element
Slide 5 - Drag question
What trend is observed as you move across a period in the periodic table?
A
Increase in the atomic radius
B
Decrease in the atomic number
C
Decrease in the number of energy levels
D
Increase in the number of protons and electrons
Slide 6 - Quiz
Which group contains elements with full outer shells?
A
Group 7 (Halogens)
B
Transition Metals
C
Group 1 (Alkali Metals)
D
Group 0 (Noble Gases)
Slide 7 - Quiz
What is the mass number of an element?
A
The number of electrons in the atom
B
The number of electrons in the outer shell
C
The total number of protons and neutrons
D
The number of protons in the nucleus
Slide 8 - Quiz
What is the atomic number of an element?
A
The number of electrons in the atom
B
The total number of neutrons and protons
C
The number of protons in the nucleus
D
The number of electrons in the outer shell
