Which is a characteristic of calcium?

A.It has two neutrons

B.It has two energy shells

C.It has two protons

D.It has two electrons in its outer energy shell

Answer:

If you pour a spoonful of salt into a glass of water, the sodium will react with the water and increase the mass.  

Explanation:

Answer:

153.6771 amu

Explanation:

From the question given above, the following data were:

Isotope A:

Mass of A = 114.3789 amu

Abundance (A%) = 64.23%

Isotope B:

Mass of B =.?

Abundance (B%) = 100 – A%

Abundance (B%) = 100 – 64.23

Abundance (B%) = 35.77%

average atomic mass of Element Y = 128.4359 amu

The mass of the 2nd isotope (i.e isotope B) can be obtained as follow:

Average atomic mass = [(Mass of A × A%)/100] + [(Mass of B × B%)/100]

128.4359 = [(114.3789 × 64.23)/100] + [(Mass of B × 35.77) /100]

128.4359 = 73.4656 + (Mass of B × 0.3577)

Collect like terms

128.4359 – 73.4656 = Mass of B × 0.3577

54.9703 = Mass of B × 0.3577

Divide both side by 0.3577

Mass of B = 54.9703 / 0.3577

Mass of B = 153.6771 amu

Therefore, the mass of the 2nd isotope is 153.6771 amu

Answer:

the large object moving quickly because the more the mas the more kenetic energy

Answer:

A. Physical Change

Explanation:

Physical change is a type of change in which no new substance is formed, change of state can occur, the appearance of matter can be altered but not its chemical component.

Molten steel being poured into molds to make car parts and then allowed to cool and harden is an example of Physical change because;

-  A change of state only occured from molten steel to solid steel.

- No new substance is formed.

Answer:

I think it a or c yea a or c

Answer: It would be B

Explanation: a magnet moves from north to south

due to pole attraction is more in the north region

Answer:

29. Proteins support the body's structural framework, chemical reactions, and contractions (muscle movement).

30. Proteins have a primary structure (polypeptide chain of amino acids), secondary structure (made up of alpha helices and beta pleat sheets), tertiary structure (superimposed on secondary structure), and quaternary structure (2 or more polypeptide chains with its own tertiary structure).

31. Protein molecules can denature if conditions aren't right, such as the wrong temperature or pH level. When denatured, proteins typically lose their shape and their function for a short time because their active sites become deactivated (though if conditions are too extreme, they can permanently lose their function). This happens to globular proteins because they are not nearly as stable as fibrous proteins due to their functional 3D shape.

I just did the first 3 since I could easily access the proteins section in my textbook at the moment. :)

I believe the answer is C. Work.

Working is basically you.. well.. working, we push and pull things all the time.

Answer:

weight

Explanation:

just trust me

Answer:

a. atom

Explanation:

 google

Answer: 1

Explanation:

The number of times a machine increases a force exerted on it The input force will be the same as the output force.

Answer:

Suspension!

Explanation:

A suspension is a heterogeneous mixture in which the solute particles do not dissolve, but get suspended throughout the bulk of the solvent, left floating around freely in the medium. The other answers are homogeneous, not heterogenous.

Have a fantastic day!

Answer:

cannot be used to produce energy in reactors.  

Explanation:

Currently, there is no reactor that can allow the use of nuclear fusion, although nuclear plants use nuclear fission reactors.

Nuclear fusion happens when thousands of atoms collide with each other when they are in the midst of extreme conditions of literature and pressure. This collision causes the atoms to fuse, creating another element. The process releases amounts of light and heat, promoting a high release of energy. This whole process occurs without the release of CO2 into the atmosphere, without the release of toxic waste and without the risk of explosions, which makes nuclear plants have a strong interest in building a reactor to use this type of energy. For this reason, scientists from different countries have collaborated with each other on a project called Iter, which seeks to build a reactor and achieve the first reaction in 2025.

Answer:

A

Explanation:

i think

Answer:

The final step of the scientific method is to communicate the results​

Answer:

A

Explanation:

chemistry is used in all areas of life

Answer: A

Explanation:

just got it right

Answer: fluorine

Explanation:

Answer:

fluorine on edge 2020

Explanation:

hope this helped:)

C Cl is a covalently bonded compound with the formula CCl₄. MgCl is an ionic compound with the formula MgCl₂.

The formation of a chemical bond between two or more atoms, ions or molecules to form a chemical compound is known as chemical bonding. The chemical bonding makes sure the atoms are together in the resulting compound.

Chemical bonding is made possible by an attractive force resulting from the overall loss of energy in the resultant molecule compared to its constituents.

Chemical compounds depend on chemical bonding for their stability. There are various kinds of chemical bonds formed. Covalent bonds and ionic bonds are 2 of the most commonly known chemical bonds.

Covalent bonds are formed by the sharing of electrons and an ionic bond is formed by the electrostatic force of attraction between the atoms.

Therefore, in the given examples, C Cl is a covalently bonded compound with the formula CCl₄. MgCl is an ionic compound with the formula MgCl₂.

Read more about chemical bonds, here

https://brainly.com/question/15444131

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The bond of the following atoms in C-Cl and Mg-Cl is polar covalent bond in C-Cl  and  Mg-Cl ionic bond.

Polar covalent bonds are created between two non-metal atoms or molecules  that do consist of different  electronegativity. and the electronegativity difference that is not equal to zero and the shared pair of electrons forming a bond between will always be towards the high electronegative atom.

An ionic bond the  complete sharing or the  electron transfer. Ionic bonds basically form or created when the difference in the electronegativity of the two atoms is great or more as compare to   covalent bonds form when the electronegativity is same.

Therefore,  bond of the following atoms in C-Cl and Mg-Cl is polar covalent bond in C-Cl  and  Mg-Cl ionic bond.

Learn more about polar covalent and ionic bond, here:

https://brainly.com/question/14470991

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Answer:

D

Explanation:

Answer:

1. D

2. A

Explanation:

Answer:

The number of each element in the molecule.

Explanation:

C₁₂H₂₂O₁₁ is one molecule, and it is made 3 elements carbon, hydrogen, and oxygen. There are 12 carbons, 22 hydrogens, and 11 oxygens. If these numbers were different, it would be a different molecule.

Answer:

This question is incomplete as it lacks the options for each hypothetical statement. The options for each hypothesis are:

wood, clay brick, iron, aluminum, copper, or nickel

The answers to each hypothesis are:

1. Wood

2. Clay brick

3. Copper

4. Iron

Explanation:

Firstly, a hypothesis is a testable explanation given to explain an observed problem or to answer a question. In this case, "which materials will meet the special needs of Parvus' house?" is the question.

The question requires one to complete the given hypotheses using the options given.

- If we use WOOD to build the roof of the house, then the temperature inside the house will remain cooler. The best answer is "wood" because wood conducts/absorbs heat the least among the materials that can be used for roofing, hence, it will make the inside of the house cooler.

- If we use CLAY BRICK to build the walls and floors of the house, then the temperature inside the house will remain cooler. Clay brick is the best material for building walls and floors of a house among the option. Also, it conducts heat fairly making the interior of the house cool.

- If we use COPPER to bring electricity into the home, then it will allow electricity to flow into the home at a faster rate. Copper, among all other metal, is the best conductor of electricity due to its properties including low resistivity. Hence, using copper will make electricity to flow into the home at a faster rate.

- If we use IRON to construct the latches on the windows and doors, then the magnetism will keep the latches secure. Iron is the metal with the best magnetic property. Therefore, using it to construct the latches on the windows and doors will guarantee magnetic security.

Explanation:

(1) Nuclear reactions involve a change in an atom's nucleus, usually producing a different element. Chemical reactions, on the other hand, involve only a rearrangement of electrons and do not involve changes in the nuclei. ... (3) Rates of chemical reactions are influenced by temperature and catalysts.

Explanation:

An electron has a negative charge and a proton is a positively charged particle. Electric field lines are used to express the direction of the electric field. For a positive charge, it is outwards while for a negative charge it is inwards. The attached figure shows the electric field lines between a proton and an electron. The field lines emerge from proton and terminate at electron.

The electrical force between charges is given by :

[tex]F=k\dfrac{q_1q_2}{r^2}[/tex]

r is the distance between charges

The force is directly proportional to the product of charges. It means that if the product of electrical charge increased, it means that the electrical force will increase proportionally.

Answer:

I don't understand what you are asking

Answer: temperature liquefaction

Explanation: At the exact time the only used method or strategy the division of helium from natural gas is low temperature liquefaction

Answer:

FALSE

Explanation: