Chemistry Flashcards
Are protons negative or positive?
Positive
What is the nucleus made up of?
Protons and neutrons
What is an element?
A substance with only one type of atom
What are the columns in the periodic table called?
Groups
What are the rows in the periodic table called?
Periods
True or false: all of the elements in a group have different numbers of electrons in their outer shell.
True
True or false: mixtures are substances that are not chemically joined up.
True
What is a compound?
Two or more atoms that are chemically joined together
Which shell fills up with electrons first?
The inside shell
How many electrons can the second shell hold?
8
What are isotopes?
Isotopes are atoms of the same element with the same number of protons but a different number of neutrons
What are the reactants in this equation?
Hydrogen + oxygen = water
Water
What are the products in this reaction?
Na + H2O = NaOH + H2
Na + H2O
What is an indicator?
A dye that changes colour when you put it in an acid or base
If universal indicator turns red when added so a solution, is it an acid or a base?
An acid
