Flashcards in Test Q&A Deck (38)
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1
What is an atom?
Tiny particles of matter that have a mass
2
What is an element?
A substance made from atoms with the same number of protons
3
What are the symbols for the following elements?
Sodium
Hydrogen
Lithium
Copper
Potassium
Argon
Calcium
Sodium - Na
Hydrogen - H
Lithium - Li
Copper - Cu
Potassium - K
Argon - Ar
Calcium - Ca
4
What are the mass of protons, neutrons and electrons?
Protons - 1
Neutrons - 1
Electrons - 0.0005
5
What are the charges of protons, neutrons and electrons?
Protons - positive
Neutrons - no charge
Electrons - Negative
6
Why do atoms have no overall electric charge?
Number of (positive) protons is the same to the number of (negative) electrons.
7
What does the atomic number tell you?
The number of protons in an atom.
8
What does the mass number tell you?
The number of protons and neutrons in an atom.
9
What is a period?
A row across the periodic table.
10
Why do elements in the same group of the periodic table have similar properties?
They have the same number of electrons on their outer shell.
11
What is the word and chemical equation for Calcium Carbonate?
Calcium Carbonate = Calcium Oxide + Carbon Dioxide
CaCO3 = CaO + CO2
12
How many of each element is in Calcium Carbonate? (CaCO3)
1 Calcium
1 Carbon
3 Oxygens
(1 Calcium and Oxygen in Calcium Oxide, 1 Carbon and 2 Oxygens in Carbon Dioxide)
13
Why does calcium chloride, an ionic compound, have a high melting point?
It has strong attractions between the ions
14
Why is oxygen a gas at room temperature?
Forces between the molecules are weak
15
What is a polymer?
Molecules made up of long chains of covalently bonded carbon atoms
16
What is an ion?
A charged particle
17
What type of bonding occurs between metals and non-metals?
Ionic bonding
18
What type of bonding occurs between 2 non-metals?
Covalent bonding
19
Where in the periodic table are the transition metals?
Middle section.
20
What does malleable mean?
Can be bent into shape
21
What properties of copper make it good for electrical wiring?
Very good conductor of electricity and not very reactive.
22
What properties of copper make it good for plumbing?
Easily bent into shape and not very reactive.
23
What is the relative mass of a neutron?
1
24
What is an atoms mass number?
Number of protons and neutrons in an atom.
25
What is an isotope?
A different form of an element with the same number of protons but a different number of neutrons
26
What are fullerenes?
Molecules of carbon shaped like closed tubes or hollow balls.
27
Describe the basic structure of graphite
3 covalent bonds, arranged in hexagons, no covalent bonds between layers, delocalised electrons
28
Describe the basic structure of diamond
4 covalent bonds, strong covalent bonds, no free electrons
29
Why are fullerenes good industrial catalysts?
Have a huge surface area
30