Atomic Number
Valence Electrons
Electron Configuration
Identify the Element
History Trivia
100
What is the atomic number of Carbon?
6
100
How many valence electrons does helium have?
2
100
What is the electron configuration of hydrogen?
1s1
100
Which element has the symbol Ag?
silver
100
"Matter is made of indivisible and indestructible atoms."
Who said this?
Democritis and Epicurus
200
What is the atomic number of Sulfur?
16
200
How many valence electrons does potassium have?
1
200
Which element has the electron configuration 1s22s2?
Beryllium
200
Which element has 35 protons?
Bromine
200
atomos means
uncuttable
300
What is the atomic number of nickel?
28
300
Elements in which group have 6 valence electrons?
Group 6
300
What is the electron configuration of sulfur?
1s22s22p63s23p4
300
Which element has the electron configuration 1s22s1?
Lithium
300
John Dalton states in his modern atomic theory:
All atoms of an element have ______ _______.
Identical masses
400
What is the atomic number of silver?
47
400
Name three elements that have 3 valence electrons.
Boron, Aluminium, Gallium, Indium, Thallium, Nihonium
400
How many valence electrons does an element with this electron configuration have?
1s22s22p3?
5 valence electrons
400
Silicon
400
Edwim Sohrodinger and Werner Heisenberg developed which atomic model?
electron cloud model (quantum mechanical model)
500
What is the sum of the atomic number of lead and the atomic number of neon?
92
500
What does it mean when the valence electron shell of an atom is full?
This means that there are not any more vacancies where another atom could bond with the original atom. These elements are typically less reactive.
500
Which element has three valence electrons in the third shell of its atoms?
Aluminum
1s22s22p63s23p1
500
Argon
500
Who developed the planetary model of the atom?
Ernest Rutherford