Flashcards in Atoms & Elements Deck (40):
How many subshells can the third shell be divided into?
3 subshells - S,P,D
How many subshells can the second shell be divided into?
2 shells - S,P
How many subshells can the first shell be divided into?
1 subshell - S
What are the four types of orbitals?
S,P,D,F orbitals - Smart People Don't Forget
What is the letter representing the 1st, 2nd, 3rd and 4th shells?
1st shell - K
2nd shell - L
3rd shell - M
4th shell - N
What is similar about elements in a particular group?
They have the same number of outer shell electrons, similar chemical properties, and they react the same
How does the number of electrons in the valence shell predict the place of an element in the periodic table?
Usually it is the last digit of the elements group number
What does the number of shells occupied by electrons tell us about an elements position in the periodic table?
The period an element is in is shown by the number of shells occupied
When do excited electrons release excess energy as light? When it jumps up or moves down?
The electron releases excess energy as light when they return, jump down, to ground state.
What is the maximum number of electrons that can be held in the first 4 shells?
Shell 1 - 2
Shell 2 - 8
Shell 3 - 18
Shell 4 - 32
What group are alkaline earths?
What is the charge of the ions formed by group 1 elements?
What is the electron charge of an atom?
Atoms of the same element with different numbers pf neutrons
Describes a compounds that is or was apart of a living thing, containing carbon
Define periodic table
A list of all the known elements arranged in order of increasing atomic number
A substance composed of atoms with the same atomic number; 118 are know to exist
Define organic molecules
Molecules that have a skeleton of carbon atoms
Define ground state
The lowest energy arrangement of an atoms electrons in energy levels (shells)
Define transition elements
A special block of metallic elements covering elements 3 - 12
Where is the mass number shown on an elements symbol?
Above the atomic number, top ^
Horizontal rows of the periodic table
Define mass number
The number of particles in the nucleus (protons + neutrons)
A special block of metallic elements with atomic numbers 57-71
Define indirect evidence
Evidence that does not involve direct observation
Group 17 elements
To absorb UV light and re-emit light that is visible
Define electron configuration
Arrangement of electrons in electron shells
Define atomic number
The number of protons in an atom
A special block of metallic elements with atomic numbers 89-103
Where is the atomic number shown on an elements symbol?
Below the mass number, bottom \/
The heavy core at the centre of an atom, made of protons and neutrons
Define noble gases
Also known as inert gases, group 18 elements known for their stability (lack of reactivity)
Define inert gases
Another name for the noble gases of group 18
Vertical columns of the periodic table
Define excited (electrons)
Electrons that have jumped to a higher energy level
Define electron shells
Also known as energy levels; the regions surrounding the nucleus where electrons may be found
The particles that make up all materials
Forms of the same element that have different molecular structures and therefore different properties