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WorksheetsMolecules and extended structures
Total questions: 18
Worksheet time: 12mins
What is H2O ?
A chemical formula that shows atomic composition
A chemical equation that shows a reaction
A chemical symbol for the periodic table
A chemical number that shows the atomic mass
What is the difference between butane and isobutane?
They have different chemical formulas
They have different atomic masses
They have different chemical structures
They have different elements in them
What is the chemical formula for caffeine (pictured)?
C4H2N10O8
CHN2O
CHNO
C8H10N4O2
Which of the following is a polymer?
What is the example in the image?
The electrons in an atom
A diatomic structure
An extended structure (macro molecule)
A water molecule
Which of the following gases is a molecule?
Oxygen (O2)
Helium (He)
Hydrogen (H2)
Carbon dioxide (CO2)
How many elements occur in nature?
18
53
92
118
Which of the following is NOT a property of a metal?
shiny
brittle
good conductor of heat and electricity
malleable
Who was Dmitri Mendeleev?
The scientist who wrote the first periodic table
The scientist who created the nuclear bomb
The scientist who discovered atoms
The scientist who discovered electrons
What is an element?
Two or more types of atoms chemically combined
An atom that releases hydrogen ions into water
The smallest particle a substance can be broken down into and still be the same substance
A reaction between two substances than produces a new substance
What elements are in polyester? (a) (b) (c)
In ammonia (NH3), how many elements are there?
1
2
3
4
In propane (C3H8), how many atoms are in a molecule?
3
8
5
11
In water (H2O), how many bonds are there?
1
2
3
4
Which image represents hydrogen peroxide (H2O2)?
Match the ratio of the element with the formula
Table salt (NaCl)
1:3
Water (H20)
1:2
Methane (CH4)
2:1
Ammonia (NH3)
1:4
Carbon dioxide (CO2)
1:1
What did Ernest Rutherford demonstrate with his gold foil experiment?
That atoms have a positive nucleus, with empty space and negative electrons outside the nucleus
That tiny particles called atoms exist, even though we can't see them
That electrons are stuck to the nucleus, like chocolate chips in cookie dough
That some atoms, such as the Noble gases, don't react with other atoms
How is starch broken down by saliva? (a)
