Which of the following is not found in the nucleus of an atom? A. Neutron
B. Electron
C. Proton
D. Quark

Answers

Answer 1

Answer: Electron - In an atom, the central part which is composed of neutrons and protons including quarks is called the nucleus. Whereas the electron is the particle with negative elementary electric charge can be found inside the atom surrounding the nucleus.

Answer 2

Answer:

Answer: electrons

Explanation:

because it is

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The freezing point of bromine is
(1) 539°C (3) 7°C(2) –539°C (4) –7°C

Answers

The freezing point of bromine is –7°C. Therefore, the correct option is option D among all the given options.

What is bromine?

Bromine (Br) is a chemical substance, a deep red toxic liquid, and a member of Group 17 (Group VII) of both the periodic chart. At room temperature, free bromine seems to be a reddish brown fluid with such a significant vapour pressure.

Bromine vapour has an amber color. Bromine has a strong odor and can irritate the skin, eyes, especially respiratory system. Even brief exposure to intense bromine vapour can be lethal. The freezing point of bromine is –7°C.

Therefore, the correct option is option D.

To learn more about bromine, here:

brainly.com/question/1952132

#SPJ2

The freezing point of bromine is (4) -7 degrees Celsius.
Hope this helps~

Which best represents the reaction of calcium and zinc carbonate (znco3) to form calcium carbonate (caco3) and zinc?

Answers

The reaction of calcium and zinc carbonate yields calcium carbonate and zinc. To balance, we should remember that the number of atoms of each element in the reactants and products side should be equal. The balanced chemical reaction is written as follows:

Ca + ZnCO3 = CaCO3 + Zn

Answer : The balanced chemical reaction will be,

$Ca+ZnCO_3\rightarrow CaCO_3+Zn$

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

If the amount of atoms of each type on the left and right sides of a reaction differs then to balance the equation by adding coefficient in the front of the elements or molecule or compound in the chemical equation.

The coefficient tell us about that how many molecules or atoms present in the chemical equation.

As per question, when calcium react with zinc carbonate then it react to give calcium carbonate and zinc as a product.

The balanced chemical reaction will be,

$Ca+ZnCO_3\rightarrow CaCO_3+Zn$

This reaction is a single replacementreaction in which the most reactive elements displaces the least reactive element from its solution.

The conductors in electrical devices are commonly made of
a. iron.,B.nickel.,C.Cooper.,D.lead.

Answers

Copper - it is bendy can conduct very well and is running out

Answer:

Copper

Explanation:

A 55.0 g piece of iron at 505 ° C is put into 735 grams of water at 15.0 ° C. What is the final temperature of the water and the iron?

Answers

Answer:

It would be 95.3

Explanation:

A substance with a definite shape and volume is a ___ phase of matter

Answers

Explanation:

Matter in which molecules have strong force of attraction are held tight together. Therefore, to break this force of attraction strong force is required.

This type of matter is know as solid. Also, it is known that solid substances have definite shape and volume.

Thus, we can conclude that a substance with a definite shape and volume is a solid phase of matter.

I would say solid shape of matter.

Alexis predicts that the size of a magnet affects its magnetic properties. She designs anexperiment using magnets of different sizes and paperclips to test her prediction. She takes
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a container of paperclips to see how many are attracted. Her results are shown in the table
below.
What should Alexis do next after examining her experimental results?