1. Border - ANS-Metalloids _______ the zigzag line.
2. Demitri Mendeleev - ANS-Made the primary periodic desk. He became writing a
textbook and desired to arrange the sixty three factors known at that time. He primarily
based his company just like the cardboard sport of solitaire.
3. Fluorine - ANS-The most active nonmetal.
4. Group 1A - ANS-Has the most active metals.
5. Group 1A - ANS-The Alkali Metal Family. Have one valence electron and are very
reactive. They are not discovered except in the form of compounds in nature.
6. Group 2A - ANS-The Alkaline Earth Metal Family. Are greater hard than Group 1A and
incorporate two valence electrons. Melting factor is better. Variations in reactivity are
among alkaline earth metals are shown by using the ways they react with water.
7. Group 3A - ANS-The Boron Family. Have three valence electrons.
8. Group 4A - ANS-The Carbon Family. Have four valence electrons. The majority of
compounds for your frame comprise carbon, and you are probably familiar with carbon
inside the shape of coal or diamond. Without carbon, life on Earth would no longer exist.
Group 5A - ANS-The Nitrogen Family. Have 5 valence electrons. 80% nitrogen is
determined within the air.
9. Group 6A - ANS-The Oxygen Family. Oxygen is the most abundant element inside the
earths crust. It's miles important for existence. The air we breath is 20% oxygen.
10. Group 7A - ANS-The Halogen Family. Have seven electrons in valence. The halogens
are extraordinarily reactive nonmetals that react easily with metals.
11. Group 8A - ANS-The Noble Gases. Helium has two valence electrons. The rest have
eight (or an octet). All noble gasses are used in neon lights.
12. Groups / families - ANS-Each vertical column. Have comparable chemical residences
and comparable electron configurations.
13. Increasing mass - ANS-Mendeleev organized his periodic desk in horizontal rows so as
of...
14. Left - ANS-Metals are to the ________ of the zigzag line.
15. Metals - ANS-Most elements at the periodic table are ______.
16. Periods - ANS-Each horizontal row of the periodic table.
17. Rare earth elements - ANS-The _________ include the Lanthanide series and the
Actinide series.
18. Right - ANS-Nonmetals are to the ________ of the zigzag line.
19. Transition metals - ANS-Form very colourful compounds.
20. Valence electrons - ANS-Are electrons located inside the most outer or highest
electricity level.