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hichkok12 [17]
4 years ago
11

Which of the following elements, essential to life, is a trace element? Which of the following elements, essential to life, is a

trace element? phosphorus carbon calcium iodine
Chemistry
1 answer:
Vikentia [17]4 years ago
7 0

Answer:

The answer to your question is Iodine

Explanation:

Elements can be classified as:

Basic elements of life: Carbon, Hydrogen, Oxygen and, Nitrogen these elements are in great quantity in the body.

Quantity elements are elements in a medium quantity in the body like Sodium, Magnesium, Potassium, Calcium, Phosphorus, Sulfur and Chlorine.

Trace elements are elements in a low quantity example: Selenium, Iodine, Zinc, Copper, Cobalt, Iron and, Manganese.

You might be interested in
Please answer number12
densk [106]
Hydrogen maybe but I don’t know for sure
7 0
3 years ago
Locations Cost of land Cost of equipment Cost of mining and reclamation Time taken to mine the area 1 $100,000 $10,000 $5,000 pe
mario62 [17]

Answer:

Location 2 will cost the least to the company to mine.

Explanation:

a) Data and Calculations:

Locations  Cost of land     Cost of       Cost of mining      Time taken to

                                        equipment   and reclamation    mine the area

1                 $100,000      $10,000         $5,000 per day        30 days

2                 $35,000       $6,000          $4,500 per day        45 days

3                 $30,000       $7,500          $3,500 per day       120 days

4                 $40,500       $8,000          $7,000 per day        65 days

Locations  Cost of land     Cost of       Cost of mining                      Total

                                        equipment   and reclamation                    Costs

1                 $100,000      $10,000         $150,000 ($5,000 * 30)  $260,000

2                 $35,000       $6,000         $202,500 ($4,500 * 45)   $243,500

3                 $30,000       $7,500         $420,000 ($3,500 * 120)  $457,500

4                 $40,500       $8,000         $445,000 ($7,000 * 65)   $503,500

7 0
3 years ago
Chlorine is a halogen and has 7 valence electrons, which is represented by crosses on the left
makkiz [27]

There are 2 electrons in the overlapping region.

Chlorine is the second member of the halogen group which are form of family of elements that resemble one another very closely.

The electronic configuration of chlorine shows the arrangement of chlorine electrons within it's atom.

At the outer most shell of the atom is seven electrons, therefore requires only one electron each to attain the octet arrangement.

The overlapping of the orbitals indicates the chemical bond formed by sharing of electrons between atoms called covalent bonding.

To complete it's outer most shell, it will need to share electron with another chlorine atom.

Therefore, there are 2 electrons in the overlapping region.

Learn more here:

brainly.com/question/16396974

3 0
3 years ago
Which is the most likely to be reduced?
NISA [10]

Answer : The correct option is, Zn^{2+}

Explanation :

  • Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. That means, the loss of electrons takes place.

Or we can say that, oxidation reaction occurs when a reactant losses electrons in the reaction.

  • Reduction reaction : It is defined as the reaction in which a substance gains electrons. That means, the gain of electrons takes place.

Or we can say that, reduction reaction occurs when a reactant gains electrons in the reaction.

According to the electrochemical series, Zn^{2+} most likely to be reduced because

Hence, the ion most likely to be reduced is Zn^{2+}.

3 0
3 years ago
What is the salt produced when calcium hydroxide, Ca(OH)2, reacts with phosphoric acid, H3PO4, in a neutralization reaction?
Pavel [41]
3Ca(OH) _{2} +2H _{3} PO _{4}⇒6H _{2} O+Ca _{3}(PO _{4}) _{2}
Calcium phosphate.  Which is your Ca3(PO4)2.
5 0
3 years ago
Read 2 more answers
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