Welp-.. 11. What are some of the characteristics of Alkali Metals?

12. Which group is inert or non-reactive?
13. Which group is known as Alkaline Earth Metals?
14. What are some characteristics of Group 2?

15. What is group 17 known as?
16. What are some characteristics of Group 17?

17. What name is given to group 18?
18. What are some properties of group 18?
19. What happens to an atom’s mass as you move from left to right on the periodic table?
20. As you move from left to right across a row of elements in the periodic table what happens to the number of protons and neutrons?

1 18

2 26

3 7

4 same number of electrons

5 Si Te Sb B Ge Po As

6 metalloids

7 Shiny, brittle, solids, good electrical conductors

8 group1 except for hydrogen

9 lustrous, malleable, ductile, good conductors of heat and electricity

10Alkali metals

11 High reactive metals.

Not found freely in nature.

Stored in a mineral oil solution.

Low melting points.

12 noble gases

13 Group 2A

14  have two valence electrons or the electrons furthest from the nucleus,

15 Halogen

16 Melting and Boiling Points (increases down the group)

Atomic Radius (increases down the group)

Ionization Energy (decreases down the group)

Electronegativity (decreases down the group)

17 noble gases

18Noble gases are colorless, odorless, tasteless, and nonflammable gases under standard conditions.

In the periodic table, the noble gases are arranged according to their boiling point.

19 are adding more protons and neutrons to the nuclei.

20 left of the staircase created by B, SI Ge, As, Sb, Te (metalloids), are all metals right are non-metals. Next the atomic number and therefore the proton number increase as you move from left to right B - 5, C - 6, N -7.

answer: substrate concentration. enzymes work best when there is a high enough substrate concentration for the reaction they catalyse.

i think the answer would be a. after sentence 14! i hope i at least a little