Atoms
Atoms are made of protons, neutrons, and _______
Electrons
H is the chemical symbol for ___
Hydrogen
True or False – A compound is made of only one type of atom.
False
What does the periodic table contain?
All the known Elements
What is an Element?
An element is a pure substance made from only one type of atom and it cannot be broken down into simpler substances.
What is the centre of an atom called?
The nucleus
What element has the atomic number 6?
Carbon
What is water made of?
Hydrogen and Oxygen?
What are the periods in a periodic table?
The horizontal rows
What chart organises all the elements?
The Periodic table
how do you find the number of neutrons of an element?
Subtract the atomic number (protons) from the mass number (total of protons and neutrons)
What element makes up most of the air we breath in?
Nitrogen
What compound do we breath out?
CO2
he periodic table is arranged in order of increasing ______ number
atomic
What is a compound?
A compound is a pure chemical substance made of two or more different elements that are chemically bonded together.
What is the name of the region where the electrons move around?
The Shell
What is gold’s chemical symbol?
Au
True or False: A compound can be separated into its elements by physical methods like filtering or evaporation.
False.
How many elements are there in the Periodic table?
118
A combination of two or more substances that are not chemically bonded.
Mixture
Who discovered the first atom?
Democritus
Which element is the only element that is liquid in room temperature? (Hint: Hg)
Mercury
NaCl is a compound we put on food. What is it called?
Table salt
Who discovered the periodic table?
Dmitri Mendeleev
What is the smallest particle of an element that still has its properties?
An Atom