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