more homework...?

Question

This is due tomorrow and i dont have my science book!!
Any Answers would Help Thanks!!=D

12] How many valence electrons does an atom in the oxygen family have?

13] Circle the letters that are true about oxygen.
a- The oxygen you breathe is a diatomic molecule.
b- Oxygen rarely combines with other elements.
c- Oxygen is the most abundant element in Earth's crust.
d- Ozone collects in a layer in the upper atmosphere.

14] How many valence electrons does an atom in the halogen family have?

15] True or false? Most halogens are dangerous to humans.

19] Why cant hydrogen be grouped in a family?

Answer 1

12. I think 6.

13. a and d are true.

14. I think 7.

15. Yes. For instance chlorine is hazardous - that's why bleach is tough on the lungs if you breathe the fumes.

16. Cause it can gain or lose an electron? So it acts like like a group 1 and group 7 atom? I think but not sure.

Answer 2

12) 6
13) a, d
14) 7
15) True
19) Hydrogen can't be grouped in a family because its properties are different from those of the noble gases and those of the halogen family. It's behaviour makes it so unique that its own family is the best solution.
and also it has one electron in its valence shell but its not a metal, its a nonmetal.

Answer 3

Ok 12: 6 Valence electrons I think
13: ?
14: 7 Valence electrons
15: Not real sure....they aren't all neassarlily good for you but Fluorine is in tooth paste and cl is in pools...so I'd say false
19: ?

Answer 4

12) 6
13)a)?
b)false
c)false
d)true
14)7
15)?
16)Hydrogen only fits in the alkali metal family because it has one valence electron but it's not a metal. It's a nonmetal. That's why there is a little space in between the hydrogen square and the alkali metals

Answer 5

12. 6 (16 total electrons, and the layers go 2, 8,8... )

13. a is true
b is false, H20, rust (iron + oxygen), ...
c is false
d is true (the ozone layer?)

14. 1 (17 total, layers go 2,8,8)
15. true (clorine gas is toxic.....)
19. Because it is the only element with only 1 proton and 1 electron

Answer 6

12.oxygen has 6 valence electrons.
14.Indeed, sometimes the natural forms are dangerous to humans.

Answer 7

12) 2
13) circle a, d

14) 1
15) true
19) because its properties are unique and different from any other element

Answer 8

just go on Google or something like that and ask that, the answer is almost guaranteed to show up.

Answer 9

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http://www.osoq.com/funstuff/extra/extra03.asp?strName=Cat

Answer 10

goooogle that shyt girl