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Setler [38]
2 years ago
9

All of the following statements about different elements are true EXCEPT: Group of answer choices Krypton is one of the noble ga

ses. Manganese is a transition metal. Sulfur is considered a metalloid. Iodine is a halogen. Barium is an alkaline earth metal.
Chemistry
1 answer:
seropon [69]2 years ago
3 0

Sulfur is an element of the periodic table that is not considered a metalloid.

<h3>What is sulfur?</h3>

Sulfur is a chemical element of the periodic table that has the following characteristics:

  • Atomic number 16
  • S symbol
  • Sulfur is classified as a nonmetal
  • It has a yellow color

<h3>What are metalloids?</h3>

Metalloids are a set of chemical elements of the periodic table that are characterized by having an intermediate behavior between metals and non-metals, in terms of ionization energies and binding properties.

It is not easy to distinguish them from true metals. They conduct electrical current better than non-metals, but they are not good conductors like metals. In addition, they are usually very varied in their shape and coloration.

The list of metalloids includes the following elements:

  • Boron (B)
  • Silicon (Si)
  • Germanium (Ge)
  • Arsenic (As)
  • Antimony (Sb)
  • Tellurium (Te)
  • Polonium (Po)

Learn more about periodic table in: brainly.com/question/11155928

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5 0
3 years ago
How many energy levels does calcium have?
Usimov [2.4K]
The element calcium has a total of four energy levels<span> that each can hold a certain number of electrons. Its first and fourth energy levels hold two electrons each, and its second and third energy levels hold eight electrons each.</span>
5 0
3 years ago
Balance the equation and identify the type of reaction for ? P4(s) + ? Ca(s) → ? Ca3P2(s). 1. 2; 6; 2 — decomposition 2. 2; 6; 2
pishuonlain [190]

Answer:

4. 1; 6; 2 — synthesis

Explanation:

<u>Decomposition reaction </u>is defined as the reaction in which a single large substance breaks down into two or more smaller substances.

AB\rightarrow A+B

<u>Single displacement </u>reaction is defined as the reaction in which more reactive element displaces a less reactive element from its chemical reaction.

The reactivity of metal is determined by a series known as reactivity series. The metals lying above in the series are more reactive than the metals which lie below in the series.

A+BC\rightarrow AC+B

<u>Synthesis reaction</u> is defined as the reaction in which smaller substances combine in their elemental state to form a larger substance.

A+B\rightarrow AB

The unbalanced combustion reaction is shown below as:-

P_4+Ca\rightarrow Ca_3P_2

On the left hand side,  

There are 4 phosphorus atoms and 1 calcium atom

On the right hand side,  

There are 2 phosphorus atoms and 3 calcium atoms

Thus,  

Right side, Ca_3P_2 must be multiplied by 2 to balance phosphorus.

Left side, Ca is multiplied by 6 so to balance the whole reaction.

Thus, the balanced reaction is:-

P_4+6Ca\rightarrow 2Ca_3P_2

Thus, answer:- 4. 1; 6; 2 — synthesis

5 0
3 years ago
1. How many grams of CuNO, are required to produce 700.0 mL of a 2.0 M CUNO,
tatyana61 [14]

Answer:

talon ka sa building

Explanation:

para wala kang problema

7 0
4 years ago
(4) After addition of hydrochloric acid, a student removes the lower aqueous layer, extracts the aqueous phase with diethyl ethe
laiz [17]

Answer:

The student did not lose any organic product in the aqueous layer

Explanation:

From the question;

After addition of hydrochloric acid, a student removes the lower aqueous layer and extracts the aqueous phase with diethyl ether (0.5 mL).

The only possible way the student could have lose the product was if there are some basic group e.g NH_2 in the compound which have a tendency of forming NH_3^+ salt.

Also these compound could be regenerated from aqueous layer by neutralizing the aqueous layer with basic solution , for example; by using sodium hydroxide (NaOH)  in which the extraction is then followed by the usage of Diethyl ether.

6 0
4 years ago
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