Elements in the same family are known to share this property regarding valence electrons
They have the same number of valence electrons
100
When writing a short-hand electron configuration code, what symbol is used within brackets?
The chemical symbol of the Noble Gas that comes right before it
100
Who is the early Greek philosopher to first proposed the idea of atoms?
Democritus
100
Which family of elements are very reactive due to having 7 valence electrons?
Halogens
200
The atomic number tells you the number of ____________ in an atom
protons
200
The Periodic Table consists mainly of ____________ (metals, nonmetals, semimetals)
metals
200
Which orbital comes next in this series (you do not need to specify the electron number):
1s2 2s2 2p6 _____
3s
200
Which scientist proved the presence of a positively charged nucleus that is small relative to the size of an atom?
Rutherford
200
Which family of elements are very reactive due to having 1 valence electron?
Alkali earth metal
300
Halogens tend to form what kind of ions?
-1 charged anions
300
Name the two families that have f orbitals
Lanthanides and Actinides
300
What does the Aufbau principle state?
Electrons will populate orbitals in increasing energy order
300
Which scientist is associated with the electron discovery?
JJ Thomson
300
Elements in this family tend to form cations by losing 2 electrons
Alkaline earth metal
400
What does multivalent mean?
An atom can have different numbers of valence electrons
400
Electronegativity increases as you go left to right and ________ to ___________ in the Periodic Table
down to up
400
Write the electron configuration code (long code) for Fe (26 protons)
What is 1s2 2s2 2p6 3s2 3p6 4s2 3d6
400
Name the scientist who first organized elements according to similar properties, which laid the foundation for today's Periodic Table
Dmitri Mendeleev
400
Which family tends to have elements whose electron configuration codes end with a d orbital?
Transition metals
500
How many neutrons exist in the carbon isotope commonly used in the carbon dating process?
8
500
Atomic radii increase as you go top to bottom and _______ to ___________ in the Periodic Table
right to left
500
Consider the electron configuration code for the element below (it's a normal atom). How many valence electrons does this element have, and what family does it belong to?
1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p5
7, Halogens
500
Which scientist disagreed with the plum pudding model and proposed the first planetary model of the atom?
Hantaro Nagaoka
500
Which families are considered the rare earth metals?