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mamaluj [8]
3 years ago
14

How many electrons are in an atom that has 25 protons and has an ion charge of negative 3

Chemistry
1 answer:
olya-2409 [2.1K]3 years ago
6 0

Answer:

7

Explanation:

3x6=18 leavig 7 behind

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Which of the following is true of group 6A?
USPshnik [31]

Answer:

The answer to your question is: Includes sulfur and gain two electrons

Explanation:

Includes Chlorine  This option is wrong, Chlorine belongs to group VII.

Includes Sulfur  This option is true, Group VI includes Oxygen, Sulfur, Selenium, Tellurium.

Gain 2 electrons . This option is true, Elements in group VI have six valence electrons so they gain to electrons to become estable.

Tend to form +2 ions  This option is wrong, this elements form -2 ions

Have 5 valence electrons This option is wrong, this elements have 6 valence electrons.

7 0
3 years ago
Which scientist discovered that the atomic number, rather than the atomic weight, is more responsible for the properties of an e
myrzilka [38]

<em>Answer:</em>

  • The correct option is Moseley who has discovered the atomic number.

<em>Explanation:</em>

  • In 1913, H. Moseley discovered a new properties of an element atomic number. He observed that elements in the periodic table can be arranged better according to atomic number rather than atomic mass.
  • The atomic number of any elements is always equal to numbers of electrons in it.
3 0
3 years ago
Which one of the following [H+] concentrations represents an acidic solution?
Nutka1998 [239]
The correct answer is C.
7 0
3 years ago
Insects often get stuck in the sap of ancient trees. The sap along with the insect inside harden forming a fossil. What kind of
shepuryov [24]
Crystallization

This is because insects that usually get stuck in sap tend to harden or crystallize, so they cannot get out. That is why it is a crystallization.
6 0
3 years ago
If an atom has 7 protons, 8 neutrons, and 10 electrons, then it has a net charge of . On the other hand, if an atom has 3 proton
zloy xaker [14]

Answer:

Neutrons play no role in the net charge of an atom, so you can ignore them here.

Proton = 7

Electron = 10

Net Charge = 7 - 10

= -3

Again,

Proton = 3

Electron = 2

Net Charge = 3 - 2

= 1

4 0
2 years ago
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