Year 8 Chemistry Word Scramble
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Question | Answer |
Is an electron :a) negatively charged b) neutrally charged c) positively charged | a) Electrons are negatively charged |
Is a neutron a) negatively charged b) neutrally charged c) positively charged | b) Neutrons are neutrally charged |
Is a proton a) positively charged b) neutrally charged c) positively charged | c) Protons are positively charged |
Do metals: a) conduct electricity b) not conduct electricity | a) Metals conduct electricity |
Are metals maliable? | Yes, metals are maliable |
Are metals ductile? | Yes, metals are ductile |
Are metals brittle? | No, metals are not brittle. |
Do metals conduct heat? | Yes, metals conduct heat |
Are metals located: a) on the left side of the periodic table b) in a column down the right side of the periodic table c) across a few groups on the right hand side of the periodic table | a) Metals are located on the left side of the periodic table |
The non-metals are :a) on the left side of the periodic table b) in a column down the right side of the periodic table c) across a few groups on the right hand side of the periodic table | c) the non-metals are across a few groups on the right hand side of the periodic table |
True or False: Elements contain only one type of atom? | True. Elements are made of only one type of atom |
True or False: Compounds contain only one type of atom. | False. Compounds are made of more than one type of atom, in a fixed ratio. EG H20 is a compound which contains twice as much hydrogen as oxygen |
True or False: The production of a gas is a sign of a chemical reaction. | True. The production of a gas does show a chemical reaction has occured |
Name 2 signs of a chemical reaction | The signs of a chemical reaction are:* change in mass* change in temperature* production of a gas* formation of a precipitate* permanent change in colour* production of light |
What is a precipitate? | A precipitate is a solid formed when 2 liquids are mixed. It is a sign that a chemical reaction has occurred. |
What is an element's atomic number? | An atom's atomic number is the number of protons in an atom's nucleus. |
What is an element's mass number? | The mass number is the number of protons + neutrons in an atom's nucleus. |
In a atom, how many electrons are there compared with the number of protons? | In a n atom, the number of electrons is EQUAL to the number of protons. |
A chemical that increases the rate of a reaction without being consumed by the reaction is called? | A catalyst |
True or False: Increasing temperature decreases the speed of a chemical reaction | False. Higher temperature increases reaction speed |
True or False: Decreasing the size of particles decreases the speed of a chemical reaction. | False. Smaller particles react faster. |
Does stirring increase the speed of a chemical reaction? | Yes, stirring increases the rate of a chemical reaction. |
Can a physical change be easily reversed? | Yes |
Can a chemical change be easily reversed? | Not ususally |
What is a sign of a chemical change? | Permanent change in colour Production of a gas Generation of light, heat or absence of heat |
How do we write a chemical equation? | reactants --> products |
What is the Periodic Table? | a list of the elements in order of increasing atomic mass. The groups show the properties. |
How are the groups shown on the Periodic table? | There are 18 groups, given as columns |
How are the periods arranged on the Periodic table? | There are 7 periods, given as rows |
Created by:
srolfe
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