Atomic Structure Flashcards
What is an atom?
The smallest particle of an element which still retains the properties of that element.
What number defines the element?
Atomic number.
What is the mass number?
The number of protons + The number of neutrons
What is the atomic number?
The number of protons OR the number of electrons (not ions)
Where are electrons found?
Energy levels/ shells
Where are protons found?
The nucleus
Where are neutrons found?
The nucleus
What is the relative charge of an electron?
-1
What is the relative charge of a neutron?
0
What is the relative charge of a proton?
+1
What is the relative mass of an electron?
0 OR 1/1840
What is the relative mass of a proton?
1
What is the relative mass of a neutron?
1
How do you work out the number of protons from the mass and atomic number?
No. of protons = mass no. - atomic no.
What is an isotope?
Atoms with the same atomic number but different mass numbers.
OR
Atoms of the same element with the same number of protons but different numbers of neutrons.
What is the Relative Atomic Mass? (RAM/Ar)
Average mass of the isotopes in an element
Relative Atomic Mass Equation
(Mass no. of isotope 1 x abundance) + (Mass no. or isotope 2 x abundance) / 100
What are periods in the periodic table?
Rows
What are groups in the periodic table?
Columns
What order is the periodic table arranged in?
In order of atomic number.
What ions do Group 1 atoms form?
1+
What ions do Group 2 atoms form?
2+
What ions do Group 3 atoms form?
3+
What ions do Group 5 atoms form?
3-
