Atomic Theory
What is the charge of a proton?
Positive
How many elements are on the periodic table?
118
Give two examples of a nonmetal
carbon, oxygen, nitrogen, sulfur, phosphorous
How many protons does Titanium have?
22
What element can be found in Period 3 Group 2?
Magnesium (Mg)
Which element is found in Period 7 Group 4?
Rf
What are the three particles that make up an atom?
Proton, neutron, electron
How many periods are on the periodic table?
7
Give two examples of metals.
tin, copper, lead, calcium, cobalt, iron, etc
How many electrons does Tungsten have?
74
What kind of metal is Zinc?
Transition Metal
How many neutrons does Calcium have?
20
Who discovered the electron?
Thomson
What element can be found in Group 7 Period 6?
Re (Rhenium)
How many valence electrons does Helium (He) have?
2
How many neutrons does Scandium have?
24
Which element in Group 3 has the least mass?
Scandium (Sc)
How many valence electrons does Aluminum (Al) have?
What does the word "atomos" mean?
uncuttable
What is the atomic number of Nickel?
28
Where can you find valence electrons?
The outermost shell
How many neutrons does Antimony have?
71
What is the atomic number of the largest element in Group 15?
115
Which element can be found in Period 3 Group 7?
nothing
Who was responsible for the solar system model of the atom?
What is the atomic mass of Mercury?
200.5
How many valence electrons does Phosphorous (P) have?
5
How many neutrons does Cobalt have?
32
Nucleus
Who developed the first periodic table?
Dmitri Mendeleev