The Atom Flashcards
(23 cards)
Definition of Atom
The smallest unit of matter; everything is made up of atoms
Definition of an Element
A substance composed of one type of atom
Definition of Compound
A substance composed of two or more elements that are chemically bonded together in fixed proportions
Definition of a Molecule
Two or more atoms that are chemically joined together
Definition of Periodic Table
The arrangement of all known elements, arranged in order of increasing atomic number
Is a period a row or column?
Row
Is a group a row or column?
Column
Who is Mendeleev?
A Russian chemist that proposed the modern periodic table
What group are alkali metals?
Group 1
What group are Halogens?
Group 7
What group are Noble Gases?
Group 0
What is an Isotope?
An element with the same number of protons but different number of neutrons
What are Ions?
An atom that has lost or gained an electron or multiple electrons
Relative Charge of Proton, Neutron and an Electron in order
+1, 0, -1
Relative Mass of Proton, Neutron and an Electron in order
1, 1, Almost 0
Order of maximum number of electrons in each electron shell
2, 8, 8 etc
What is the electron configuration of an element with the atomic number of 53
2.8.8.8.8.8.8.3
What does a small s, g, l and aq next to a chemical mean in order?
It means the chemical is a solid, gas, liquid and a substance that can be dissolved in water (aqueous)
What are the signs of a chemical reaction?
Gas being produced, Colour change, Temperature change, Light (energy) given off
How to balance Fe2O3 + C —> Fe + CO2
2Fe2O3 + 3C —> 4Fe + 3CO2
How many electrons, protons and neutrons does iron have? (Atomic number: 26, Atomic mass: 56)
Electrons = 26, Protons = 26, Neutrons = 30
Who created the Plum Pudding model?
J.J Thompson
What did J.J Thompson discover?
The electron
