Atoms and Elements Flashcards
what is an element?
a simple substance made up of the same kind of atom
What are the simple substances called?
Elements.
What is a element?
A simple substance made up of one atom
If a substance can split up does that make it a element?
No, if you can split a substance up that’s not a element
Are substances that don’t split up elements?
Yes
Name two ways of splitting up a substance
Heating it or dissolving it in water/melting then passing an electric current through it
Can you split up copper chloride?
Yes because it is not a element but a compound
What is the test for oxygen?
Put a glowing splint into the tube of gas and if the splint bursts into flame then it is a oxygen gas
What do we get when we heat up copper carhonate
Copper oxide
What does the copper oxide turn into when we heat it up with hydrogen?
It turns into copper
Why does copper oxide turn into copper when heated with hydrogen?
In the reaction the hydrogen takes the oxygen out of the copper oxide to form water
What is a element made out of?
An element is made of tiny particles called atoms
How is an argon atom different from a helium atom?
Argon atoms are bigger and heavier than helium atoms
Are there more metals or non-metals amongst the elements?
Metals
What are the two main way of splitting a substance?
Heating it and dissolving it in water.
Is Copper Chloride an element? why?
No, because it can be split up.
Is Copper an element? why?
Yes, because it can not be split up.
what are the three main ways of splitting up a substance?
-heating it-dissolving it-melting it
elements are made up of very small particles called_____
atoms
how do you test for oxygen?
place a glowing splint into a test tube and test if the flame reignites
Is Chlorine an element? why?
Yes, because it can not be split up.
Can Mercury Oxide be split up?
Yes.
Can Mercury or Oxygen be split up?
No.
what substance do you get when you react mercury + oxygen?
mercury oxide
