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Atoms and Atomic Structure

Questions about the structure of atoms/molecules and the resulting properties such as shape, polarity, and number of subatomic particles.

500 Questions

Why the size of an atom does not decrease regularly in a period?

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Asked by Wiki User

the size of atom doesn't decrease regularly due to the reason of lanthanide contraction .there is slightly increase or or almost no increase in atomic radius from 5th to 6th period in transition metal .

What are electically charged atoms that have either lost or gained electrons?

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Asked by Hobbies13

Electrically charged atoms are collectively called ION.S.

Once an atom becomes elecgrically charged it is no longer an atom , but an ION.

A positively charged ion is called a CATION e.g. Na^(+)

A negatively charged ion is called an ANION e.g. Cl^(-) .

How many atoms are there in a molecule of hydrogen?

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Asked by Wiki User

A molecule of hydrogen, also known as molecular hydrogen, is composed of two atoms of hydrogen. This diatomic molecule is represented by the chemical formula H₂, indicating the two hydrogen atoms are bonded together.

How many atoms are there in one mole of chlorine gas?

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Asked by Wiki User

Chlorine gas is a diatomic molecule, Cl2. Two atoms per molecule. A mole contains Avogadro's Number of particles, that being (approximately) 6.02 x 1023. Hence, the number of atoms in one mole of chlorine gas is twice Avogadro's Number, or approximately 1.204 x 1024.

Sometimes atoms form molecules by sharing two pairs of valence electrons When this occurs the atoms are said to be joined by?

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Asked by Wiki User

A double bond. Each atom that can share valence electrons has a bonding capacity corresponding to the number of covalent bonds the atom can form. When the bonds form, they give the atom a full complement of electrons in the valence shell. The bonding capacity of oxygen, for example, is 2. ( O=O )

How many atoms are found in 4co2?

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Asked by Wiki User

There are 3 atoms in one CO2. So there will be 12 atoms in 4CO2.

What is atomic number of an atom?

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Asked by Wiki User

The ATOMIC NUMBER (Z) gives the position of an element in the Periodic Table.

It also indicates the number of protons and electrons in an atom of a given element.

Taking two examples;-

Z = 1 ; Hydrogen ; No. of protons = 1, No of electrons = 1

Z = 6 ; Carbon ; No. of protons = 6, No of electrons = 6

What elements are TNT made of?

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Asked by Wiki User

TNT is 'tri-nitrotoluene'.

This is a benzene ring of 6 carbons.

On Carbon No. 1 the is a CH3 group

On carbons No's. 2,4 & 6 there are three NO2 group .

The remaining two carbons viz, 3 & 5 , have an hydrogen attached.

So the elements present are Carbon, Hydrogen, Nitrogen and Oxygen.

The formula is C7H5N3O6

What force keeps the protons and neutrons in the nucleus What causes this force?

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Asked by Wiki User

The force that keeps protons and neutrons bound together within the atomic nucleus is called the "strong nuclear force" or "strong interaction." The strong nuclear force is one of the fundamental forces of nature and is responsible for holding the nucleus together despite the electric repulsion between positively charged protons.

The strong nuclear force is mediated by particles called "gluons." Gluons are the carriers of the strong force and interact with quarks, which are the elementary particles that make up protons and neutrons.

The strong force is unique in that it becomes stronger as particles get closer together, thus overcoming the electromagnetic repulsion between protons.

The strong force is crucial for the stability of atomic nuclei and plays a significant role in nuclear physics. It is responsible for binding protons and neutrons together to form the nucleus and is also involved in processes such as nuclear reactions and nuclear energy production.

How many atoms are in 2HNO3?

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Asked by Wiki User

There are 10 atoms in two nitric acid molecules. Namely they are two hydrogen atoms, two nitrogen atoms and six oxygen atoms.

How many molecules does alcl3 dissociate into?

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Asked by Wiki User

It does NOT form molecules.

When AlCl3 'breakdown ' it form the IONS Al^(3+) & 3 Cl^(-)

AlCl3(s) IS a molecule.

What is the equation for the alpha decay of americium 243?

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Asked by Wiki User

Americium-243 might undergo alpha decay to become neptunium-239, and here is that equation:

95243Am => 93239Np + 24He++

The americium-243 has undergone transmutation to become neptunium-239, and the alpha particle, which is a helium-4 nucleus, can be seen on the tail end of the equation.

Adenosine is what combination of two molecule names?

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Asked by Wiki User

Adenosine is a combination of the molecule adenine and the sugar ribose. It is a nucleoside that plays a key role in various biochemical processes in the body, such as energy transfer and signaling pathways.

What are the different elements of poetry?

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Asked by Wiki User

Elements of Poetry

There are several elements which make up a good poem,

  1. Rhythm
  2. Lines
  3. Rhyme
  4. Special Effects
  5. Theme
  6. Imagery

For more information see my teacher at Xavier University Grade School , Mrs. Mitta L. Paderanga.

Why did the littuns always obey the summon of the conch?

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Asked by Wiki User

The littuns obeyed the summon of the conch in "Lord of the Flies" because it represented order and civilization in their society. They viewed the conch as a symbol of authority and democracy, so they followed its call as a way to maintain structure and organization among the boys on the island.

What element has 16 prontons and 18 neutrons?

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Asked by Wiki User

It is only the protons that matter in classifying the element. Sulfur has 16 protons (An atomic number of 16).

What is a mixture of sub atomic particles nuclei and electrons?

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Asked by Wiki User

An ATOM.

The sub-atomic particles are

Protons, Neutrons. and Electrons.

The protons and neutrons are collectively named 'nucleons, because they form the nucleus of an atom.

The electrons are in energy shells around the nucleus.

How isotopes can have different masses and still be the same element?

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Asked by Wiki User

For the same element the number of protons and electrons remains unaltered.

Howerm for that same element the number of neutrons can vary., leading to different atomic masses.

Taking hydrogen as an example. It has three isotopes.

#1 ; protium ; 1 proton , 0 neutrons (Atomic Mass ; 1 + 0 = 1 )

#2 ; deuterium ; 1 proton , 1 neutron ( Atomic mass ; 1 + 1 = 2)

#3 ; tritium ; 1 proton, 2 neutrons ( Atomic Mass ; 1 + 2 = 3)

Notice for each isotope of hydrogen there is only ONE proton. However, for each different isotope of hydrogen there is a different number of neutrons.

The Atomic Mass is the sum of the protons and neutrons).

#4 ; Helium(He) ; 2 protons, 2 neutrons ( atomic mass 2 + 2 = 4 ).

For comparison helium has 2(TWO) protons and 2 neutrons, but it is an entirely different element, because it has a different number of protons.

Do isotopes have the same number of protons and electrons?

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Asked by Wiki User

YES!!!

The difinitive answer is ' Isotopes of an element have a DIFFERENT number of neutrons'.

Takinf an example. The element Hydrogen .

It has three isotopes. They are: -

#1 ; protium ; 1 proton , 0 neutrons, 1 electron ; Atomic mass '1'

#2 ; deuterium ; 1 proton , 1 neutron , 1 electron ; Atomic mass '2'

#3 ; tritium ; 1 proton 2 neutrons 1 electron. 'Atomic mass '3',

Carbon also has three isotopes biz.,

# 1 ; Carbon-12 ; 6 protons, 6 neutroins, 6 electrons ;Atomic mass '12'

#2 ; Carbon-13 ; 6 protons, 7 neutroins, 6 electrons ; Atomic mass ''13'

#3 ; Carbon-14 ; 6 protons, 8 neutroins, 6 electrons ; Atomic mass '14'.

Notice in each case the number of neutrons changes, the number of protons remains the same, otherwise it is a different element. The Atomic mass is the sum of the protons and neutrons.

NNB Every element has isotopes.

NNNN Do not confuse 'Isotopes' with 'Allotropes'. Allotropes are elements exhibiting a different physical form/appearance.

What are three main components of an an atom?

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Asked by Wiki User

Protons, Neutrons, and Electrons.

Protons and Neutrons are found in the nucleus of an atom, and collectively called 'nucleons'.

Electrons are found outside the nucleus, in energy shells.

In a chemical reaction an iron atom became the ion Fe2 plus . What happened to the iron atom?

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Asked by Wiki User

The iron atom loses two(2) electrons to be come the Iron ION.

Fe = Fe^(2+) + 2e^-

NB An atom , when it becomes a charged spacied , is no longer an atom , but an ION.

Positively charged ions are CATIONS

Negatively charged ions are ANIONS.

How many atoms of each type are represented in 4HNO3?

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Asked by Wiki User

4HNO3 means

HNO3 + HNO3 + HNO3 + HNO3

Taking any one HNO3 it has

1 x H (Hydrogen)

1 x N (Nitrogen)

3 x O (Oxygen)

1 + 1 + 3 = 5 So any one HNO3 has five atoms.

So four lots of HNO3 has 4 X 5 =20 atoms.

So no. of each type is

4 x hydrogen

4 x Nitrogen

12 x Oxygen

4 + 4 +12 = 20 as above.

4HNO3 would be said as 'Four molar ratios of nitric acid'.

What is the atomic number of polyethylene?

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Asked by Wiki User

There is NO atomic Number for polyethylene.

It is a compound containing millions of carbon and hydrogen atoms.

Its formula is shown as -[CH2-CH2=]=(n)

Where 'n' is the number of units, which can be thouands or millions making one polymer molecule

What parts of an atom are located in the nucleus of the atom?

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Asked by Wiki User

The PROTONS and NEUTRONS. Collectively they are called ' nucleons'.

Electrons are in energy shells around the nucleus.

How many carbon atome does hexane have?

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Asked by Wiki User

Hexane is '6' carbon atoms.

As per the IUPAC noimclature (naming system). The number of carbons goes by the following names.

#1 ; meth ; methane (CH4)

# 2 ; eth ; Ethene (H2C=CH2)

#3 ; prop ; Propyne (CH3-C///CH)

#4 ; but ; butane (CH3CH2CH2CH3)

#5 ; pent ; pentane (CH3CH2CH2CH2CH3)

#6 ; hex ; hexane (CH3CH2CH2CH2CH2CH3)

#7 ; hept ; heptane (CH3(CH2)5CH3)

#8 ; oct ; Octane (CH3(CH2)6CH3)

#9; non ; nonane (CH3(CH2)7CH3)

#10 ' dec ; decane (CH3(CH2)8CH3)

The naming system does go on , but these are the first ten names.

This nomenclature is based on Latin numers.

Depending on the functional group present, the suffixes are -ane(alkane), -ene(alkene) and -yne(alkyne)

Note the one letter difference in the functional group name for 'a', 'e' amd 'y'.