2.
An ion has 15 protons, 16 neutrons, and 18 electrons.
a.
b.
What is the atomic number?
What is the mass number?
What is the overall charge?
d. Write the isotope notation.
C.

Answer:

hope this will help you......

Answer:

i don't know send on my insta I'd its_arsh_pb27

Explanation:

Answer:

both particles and waves

Explanation:

this is known as wave-particle duality.

I hope this helps.

Have a nice day.

Elements are now organized by increasing atomic mass. Hence, option B is correct.

The periodic table is a tabular array of chemical elements organized by atomic number.

Mendeleev's periodic table orders the elements based on their atomic mass whereas the Modern periodic table orders the elements based on their atomic number.

Hence, option B is correct.

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The correct answers are Potential and Kinetic energy.

An object can store energy as a result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as a result of its position.

Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.

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The Balanced Reaction is  2N₂O₃⁻  ----->   2 N₂ + 3 0₂

A reaction in which the number of atoms of each element in the reactant and the product are equal is called a Balanced Reaction .

It is given in the question:

To Balance the chemical equation.

N₂O₃⁻  ----->    N₂ + 0₂

To balance the reaction , the number of molecules of each element , i.e. Nitrogen (N) and Oxygen (O) needs to be balanced

2N₂O₃⁻  ----->   2 N₂ + 3 0₂

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The noble gas, Helium has only two electrons with the electronic configuration as 1s2. Hence, it does not have a complete octet. and thus, it doesn't follow the octet rule.

An octet is a set of eight. Atoms of each of the noble gases (except helium) have eight electrons in their highest occupied energy levels and the general electron configuration of ns2np6.

Answer:

When a substance is cooled, its internal energy decreases: the movement of its particles decreases. bonds between particles form when a substance condenses or freezes, or sublimes to form a solid from a gas. What is called energy? Energy is the capacity of a physical system to do work.

Explanation:

The percent composition of boron in diborane (b2h6) is 78% because the mass of boron is higher than hydrogen atom.

Diborane is a poisonous, reactive gas that is produced by the action of acids on borides. Diborane is used as a reducing agent for making other chemicals and also act as a catalyst.

So we can conclude that The percent composition of boron in diborane (b2h6) is 78% because the mass of boron is higher than hydrogen atom.

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The compound diborane can be used as a rocket propellant. the percentage composition of boron in diborane (B2H6) is 75%. Option D. This is further explained below.

Generally, Diborane is simply defined as a compound having the molecular formula B2H6, Diborane is more often known as diborane.

In conclusion, As a rocket fuel, diborane is a useful chemical. Diborane (B2H6) contains 75 percent boron by weight.

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The AZX symbol of  a cation with 13 neutrons is A = 24 , Z = 11 and X = Na+

AZX is a symbol which stands for;

Note, cations are positively-charged ions having more protons than electrons due to loss of one or more electrons.

Sodium ion represented as Na+ is a cation which lost one electron. It has 13 neutrons and 11 protons.

But the mass number of an element, A is the sum of protons and neutrons of the element.

Thus, for Na+

A = 13 + 11 = 24

Z = 11

X = Na+

Therefore, the AZX symbol of  a cation with 13 neutrons is A = 24 , Z = 11 and X = Na+

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Answer:

Explanation:

This means that the atomic mass of methane is 12.011+4(1.00794)=16.04276 g/mol.

This means that in a 37.8-gram sample of methane, there would be [tex](37.8)\left(\frac{25.1}{100} \right)=\boxed{9.49}[/tex] grams of hydrogen.

Answer:

how many particles are pushing something

Answer:1# reactants 2#coefficient

Explanation:

Answer: B - 0.0098 moles

Explanation:

<3

Answer:

3.1 x 10^10

Explanation:

there are 9 zeroes, so the quick way is too just add a one to the 9 and you get 10, so that is your power.

Answer:

3139542g

Explanation:

That's because if you talk about

4.5

moles of sodium fluoride, you would get a really absurd number of grams.

Answer: Infiltration

Explanation: it is the process by which surface water, rainwater or snowmelt seeps into the ground

Answer:

B

Explanation:

The methyl prefix means theres a CH3 group bonded to a carbon in a hydrocarbon. This is called branching because it looks like a branched tree. This is literally cheating but you do you.

The ionization constant from the reaction as shown in the calculation is 5.8.

The term ionization constant refers to the extent to which the acid is ionized in solution. It is calculated from;

Ka = [H3O^+] [Cl]/[HCl]

Thus when we substitute the values;

Ka = 13.3 * 7.4/ 16.9

Ka = 5.8

The ionization constant from the reaction as shown in the calculation is 5.8.

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Answer:

1. not affected by a magnet                      1 liquid

2. mostly space                                          2 solid

3. flows freely but particles still attract 3 proton

4. positively charged particles                  4 gas

5. free to move in all space                       5 alpha particles

6. negatively charged particles                 6 atoms

7. atoms nearly fixed in space                   7 gamma ray                                                    8. helium nucleus                                        8 electron (beta)

Answer:

1) Ice, iron, calcium oxide and mercury are pure substances since they contain particles of only one kind of matter.

2) In contrast, milk, hydrochloric acid (hydrogen chloride gas dissolved in water), brick and air cannot be called pure substances because they consists of particles of more than one kind of matter.

More positive ions shows acidic whereas more negative ions indicates basic solution.

That side which has more positive charges is considered as acidic solution while on the other hand, that region where negative charges are present in large number as compared to positive charges is considered as basic or alkaline solution.

So we can conclude that more positive ions shows acidic whereas more negative ions indicates basic solution.

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Taking into account the scientific notation, the result of the sum is 6.6365×10⁵.

First, remember that scientific notation is a quick way to represent a number using powers of base ten.

The numbers are written as a product:

a×10ⁿ

where:

You want to add two numbers in scientific notation. It should be noted that when the numbers to be added do not have the same base 10 exponent, the base 10 power with the highest exponent must be found.

In this case, the highest exponent is 5.

Then all the values ​​are expressed as a function of the base 10 exponent with the highest exponent. In this case: 8.6500×10³= 0.086500×10⁵

Taking the quantities to the same exponent, all you have to do is add what was previously called the number "a". In this case:

0.086500×10⁵ + 6.5500×10⁵= (0.086500+ 6.5500)×10⁵=  6.6365×10⁵

Finally, the result of the sum is 6.6365×10⁵.

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c3h6 + cl2---- c3h6cl2 is a type of  equation represents an addition reaction because new products are formed.

Addition reaction is a type of reaction in which one molecule combines with another to form a bigger molecule having no other products. We can see that the above reaction has no byproduct.

So we can conclude that c3h6 + cl2---- c3h6cl2 is a type of  equation represents an addition reaction because new products are formed.

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Answer:

Answer:

B - The energy of reactants is conserved.

D - the nuclei of atoms changes completely ( if that's the option)

In this case, among the list of components given, the abiotic factors are water, rock, soil, and sun.

An abiotic factor is a non-living part of an ecosystem that shapes its environment.

Biotic and abiotic factors make up a community via interaction.

Biotic factors are considered living things (having "life") while abiotic factors are simply non-living things.

Hence, in this case, among the list of components given, the abiotic factors are water, rock, soil, sun

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The alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.

The alkali metals have the high thermal and electrical conductivity. It has high lustre, ductility, and malleability as compared to other materials. Each alkali metal atom has one electron in its outermost shell which make more reactive.

So we can conclude that the alkali metals can't exist alone in nature because of incomplete outermost shell of alkali metals.

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