Chemistry End Of Topic Friday 16th May Flashcards
(33 cards)
What are all elements made of
Atoms
How many different elements are there in nature
92
What does the periodic table show
The 92/known elements
True or false
Each element has a unique symbol
True
What do all element symbols have in common
The first letter is always capitalised
What do we call the rows elements are in
Periods
What do we call the columns elements are in
Groups
True or false
Each element has two numbers
True
What are the two numbers elements have called
The mass and atomic numbers
Which number is unique to all elements in the periodic table
The atomic number
What are the elements in the periodic table that have unusual properties called
Metalloids
What is a element
A substance made of only one type of atom
What is a compound
A substance made of two or more different elements chemically bonded together
What is a mixture
Two or more substances combined that are not chemically combined
Where in the periodic table are the metals found
On the left hand side
What is the one element that is liquid at room temperature and why
Mercury because 25*c is higher than it’s melting point
Which 3 metals are magnetic
Iron, Nickel, Cobalt
What is the name of elements that have matallic and none-metallic properties
Metalloids
Give 2 examples of a metalloids
Carbon, graphite
What does electrical conductivity mean
It is a measure of a materials ability to conduct electric currant
What does thermal conductivity mean
It is a measure of a materials ability to conduct heat
Give 3 examples of mixtures of metallic elements
Brass
Steel
Bronze
Give 4 examples of metals
Iron, copper, Nickel, Zinc
What are two environmental consequences of acid rain
It kills aquatic life and forests
