Flashcards
Sem título
Flashcards do conjunto (26)
- 1What are the two particles that are found in the nucleus?Protons and neutrons
- 2Where are the electrons found?Shells or energy levels
- 3What is the charge of a proton?Positive
+1 - 4What is the charge of an electron?Negative
-1 - 5What is the charge of a neutron?0
Neutral - 6What does the atomic number (smaller number) tell you?The number of protons
- 7What does the mass number (the bigger number) tell you?The number of protons added to the number of neutrons
- 8If there are 11 protons in an atom, how many electrons will there be?11
- 9What is the maximum number of electrons that can go in to shell 1 and shell 2?Shell 1= 2
Shell 2= 8 - 10What do all elements in the same group have in common?They all have the same number of electrons in their outer shell
- 11Why are noble gasses stable and unreactive?They have a full outer shell
They don't want to lose or gain electrons - 12What is the name of the type of substance that contains only one type of atom?An element
- 13What is a compound?A substance that contains two or more types of atoms chemically bonded
- 14Name the compound formed between sodium and chlorineSodium chloride
- 15Name the compound formed between potassium, bromine, and oxygenPotassium bromate
- 16How many carbons are in the compound Na2CO31
- 17All group 2 elements form an ion with a charge of ?+ 2
- 18All group 7 elements form a charge of ?-1
- 19If an atom gains 2 electron, what will the charge of the ion be?-2
- 20Why would a pure metal not be suitable for a hip replacement?It would be too soft
- 21Lithium + Water--> ____________________ + ________________________Lithium hydroxide + Hydrogen
- 22What would you see if a gas is being produced?Bubbles
- 23Why is an alloy hard?Different sized metal ions
Distorted layers
Layers can't slide over each other - 24What would you observe when lithium is added to water?It moves about
Bubbles of gas - 25Why is an atom overall electrically neutral?Protons are positive
Electrons are negative
There are equal numbers of protons and electrons - 26Why is it bad to have air in a light bulb?This would cause burning
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- FlashCards sobre Sem título, criado por tanya-williams46 em 16-06-2016.
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- tanya-williams46
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