Scientists
Horizontal rows on the Periodic Table are called...
7. Periods
This family is full of elements that do not react with others, such as Neon.
5. Noble Gas
The elements to the right of the semimetal staircase are...
13. Nonmetals
Negatively charged ions are called...
16. Anions
Which element has a larger atomic radius: Barium (Ba) or Calcium (Ca) ?
21. Barium (Ba)
He arranged the elements by Atomic Number and is known as the Father of the Modern Periodic Table.
3. Henry Moseley
This reactive family of metals all have one valence electron. (ex. Sodium)
8. Alkali Metals
Gold (Au)
17. Metal
How many valence electrons does Oxygen (O) have?
Question 19: 6 valence e-
Which element has a higher ionization energy: Silicon (Si) or Chlorine (Cl)
23. Chlorine (Cl)
This scientist arranged elements into triads, or groups of three.
2. Johann Dobereiner
Magnesium and Calcium belong to this family.
9. Alkaline Earth Metals
Sulfur (S)
17. Nonmetal
Which has a larger atomic radius: a P atom or P3- ion
29. P3-
Which has the higher electron affinity, Rubidium (Rb) or Sodium (Na)
25. Sodium (Na)
Who arranged elements into octaves (groups of 8)?
4. John Newlands
Groups 3-12 are all a part of this family.
11. Transition Metals
Boron (B)
Which has a larger atomic radius: a Ca atom or Ca2+ ion
28. Ca atom
Which element has a higher electronegativity: Boron (B) or Oxygen (O)
27. Oxygen (O)
Who arranged the elements into a table ordered by atomic mass and is known as the Father of the Periodic Table?
1. Dmitri Mendeleev
This family of nonmetals is full of incredibly reactive elements such as Fluorine.
10. Halogens
Neodymium (Nd)
17. Metal
Cations have a (larger/smaller) atomic radius than their neutral atoms.
The amount of energy needed to remove an electron from an atom is called....
22. Ionization energy