(Wk1) Atoms, Matter, Atomic Structure and the Periodic Table Flashcards
Week 1
What are the 3 subatomic particles called?
Protons, Neutrons and Electrons
Who created the modern Periodic Table?
Dmitri Mendeleev
What are the charges of the subatomic particles?
-Protons: Positive
-Electron: Negative
-Neutron: Neutral
What is the horizontal (—>) column called in a Periodic Table?
How many are there?
Period. There are 7 Periods in a Periodic Table
What is the vertical column called in a Periodic Table?
How many are there?
Group. There are 18 Groups in a Periodic Table.
What is Chemistry?
Chemistry is the study of matter, its component parts and its properties as well as interactions.
What is the nucleus composed of?
Protons and Neutrons in the centre of the atom.
What is the overall charge of a Nucleus?
Positive. Protons are positively charged and Neutrons have no charge so the overall charge of the nucleus is Positive.
What is the mass of each of the subatomic particles?
-Protons: 1
-Neutrons: 1
-Electrons: Negligible (1/1800)
What does the mass number of an element tell us?
It tells us the total number of protons and neutrons. (Highest number of an element in the periodic table)
What does the atomic number of an element tell us?
It tells us the number of protons that element has.
It also tell us the number of electrons.
What is the definition of Relative Atomic Mass (Ar)?
RAM is the average mass of all atoms of an element relative to 1/12th of the mass of an atom of Carbon-12.
What is the formula for Relative Atomic Mass?
Ar = ∑ (abundance x atomic mass)
*convert abundance to decimal, if given as a %
