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alex41 [277]
3 years ago
10

Element z reacts with bromine to form an ionic compound zbr2. A) state with reasons i) the physical properties of zbr2 at room t

emperature ii) whether z is a metal or non metal B .. Predict two other physical properties C.. Deduce the charge on z D ... What is the formula of oxide formed?
Chemistry
1 answer:
mafiozo [28]3 years ago
8 0
Idk but I think it’s B.
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0.6moles

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Which part of the atom takes up the most space
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Consider the reaction:
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2 one is the correct one

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5 0
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Earth is approximately 1.5x10^8 km from the sun. The speed of light is 3.0x10^8. How many minutes does it take for light to reac
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1.5 x 10^{8} mm = 1500 x 10^{8} m

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3 0
3 years ago
1. Explain how groups 1A-8A in the periodic table are organized by their number of valence electrons.
nirvana33 [79]

Explanation:

1. Explain how groups 1A-8A in the periodic table are organized by their number of valence electrons.

The valence electrons in an atom are the outermost shell electrons. They are the most loosely held electrons in an atom.

Coincidentally, the periodic table of elements divided into vertical groups and horizontal periods can be said to be arranged according to the number of valence electrons.

  • Atomic numbers are used to arrange elements on the periodic table.
  • Down a group, the number of electronic shell increases. More electrons are added to new energy levels.
  • As we move from left to right across a period, the number of electrons in elements increases but electronic shell is the same.
  • Down a group electronic shell increases but the number of valence electrons are the same.
  • All elements in Group 1A has just one valence electrons, Group 2A has two valence electrons.........Group 8A has eight valence electrons.
  • Moving across groups is synonymous to moving from left to right on the periodic table.
  • Due to this trend, the periodic table is arranged based on the number of valence electrons.

3. explain how you know the number of valence electrons for each group.

The number of valence electrons in a group is the group number:

   Group      Number                     valence electrons

              1A                                                 1

              2A                                                2

              3A                                                 3

              4A                                                 4

               5A                                                5

               6A                                                6

               7A                                                7

               8A                                                8

learn more:

Periodic table brainly.com/question/1971327

#learnwithBrainly

6 0
3 years ago
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