how is iodine 131 different from a normal atom of iodine?

Answers

Answer 1

Answer:

Iodine 131 is an unstable/radioactive isotope of iodine and a normal atom of iodine is stable.

Explanation:


Related Questions

The kinetic energy of a moving object depends on its mass and its
a. volume.
b. velocity.
c. distance.
d. acceleration.

Answers

I think the answer is a, volume, but I still might be wrong.
It’s the volume of the object

If a sample of copper is 215g, how many moles of copper atoms are in the sample?

Answers

Answer:

3.38 moles.

Explanation:

The following data were obtained from the question:

Mass of copper (Cu) = 215 g

Number of mole of copper (Cu) =...?

The number of mole of copper (Cu) in 215 g can be obtained as follow:

Mass of copper (Cu) = 215 g

Molar mass of copper (Cu) = 63.55 g/mol

Number of mole of copper (Cu) =...?

Mole = mass /Molar mass

Mole of Cu = 215/63.55

Mole of Cu = 3.38 moles

Therefore, 3.38 moles of copper (Cu) is present in the sample.

The maximum amount of statie friction between this chair
and the floor is 175 N.
Which action would cause the chair to move to the left?
A. Applying 100 N of force to the chair from the left
B. Applying 200 N of force to the chair from the left
O c. Applying 200 N of force to the chair from the right
O D. Applying 100 N of force to the chair from the right

Answers

In order to overcome static friction, a force greater than 175 N would need to be applied to the chair, so we can eliminate A and D. Since you want to move the chair to the left, you’d have to push from the right, so the correct answer is
C) applying 200 N of force to the chair from the right

Answer:

C

Explanation:

A p ex

1 point
Nitrogen has three occurring isotopes: Nitrogen-13, Nitrogen-14, Nitrogen-15. Which isotope is the most abundant?

Answers

Explanation:

Nitrogen-14 is the most abundant isotopes of Nitrogen.

If a gold bar is 16,000 g mass and 800 cm^3 volume what is the density?

Answers

Answer:

The answer is 20 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 16,000 g

volume = 800 cm³

We have

[tex]density = \frac{16000}{800} = \frac{160}{8} \\ [/tex]

We have the final answer as

20 g/cm³

Hope this helps you

Which of the following statements regarding the moon and Earth is correct? Question 9 options: A) The moon is older than Earth by approximately 300 million years. B) Earth is tidally locked, while the moon spins on its axis. C) Earth and the moon have nearly the same mass. D) Earth and the moon are nearly the same age.

Answers

The statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).

When did the Moon form?

The Moon formation refers to the geological period of time in which our natural satellite emerged as an independent celestial body.

It has been proposed that the Moon emerged first compared to the Earth (approximately 300 million years).

In conclusion, the statement 'The moon is older than Earth by approximately 300 million years' is True (Option A).

Learn more about the Moon here:

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Which of the following is the conjugate acid of H2P04- ?
A. HAP04
O B. PO 3-
O C. HP04-2
O D. H3PO4

Answers

Answer:

phosphoric acid H3PO4

The conjugate acid of H₂PO⁴⁻ is H₃PO₄. Therefore, option D is correct.

A conjugate acid is a species that is formed when a base accepts a proton (H⁺). It is the species that is one proton (H⁺) more acidic than the original base.

The base is the species that can accept a proton (H⁺), and the conjugate acid is the species that is formed when the base accepts the proton. The conjugate acid has one additional proton compared to the base.

Conjugate acids play an important role in acid-base reactions as they are formed when bases accept protons, and they can donate protons in subsequent reactions to regenerate the original base.

Learn more about conjugate acids, here:

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Compounds are created when atoms of different elements _____.

1.form chemical bonds
2.have different chemical properties
3.form physical bonds
4.have similar chemical properties

Answers

Answer:

1.form chemical bonds

Which of the following is NOT a characteristic of a compound?
A. has different properties from the elements that formed it
B. pure substance made of two or more elements
C. can be represented by a chemical formula
D. different samples have different properties

Answers

Answer:

I think it's D

sorry if I'm wrong.

Explanation:

Options that are not characteristics of compound in the question is D. different samples have different properties.

A compound can be regarded as a substance which is formed by chemical  combination of two or more elements.Examples of compound are water ( H2O), Sodium chloride ( NaCl)

Some of the properties of a compound are;

A compound will always has a different properties which is different from the properties of each of the elements making up the compound.A compound are formed as a result of  two or more elements that combined chemically.A compound can be identified with its chemical formula.

Therefore, option D is correct because a compound will only has its own properties not that

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If all the deer disappeared from this community, which change would be most
likely to occur?

Answers

Answer:

i think the grass population would decrease

Explanation:

Answer:

The Coyote population would decrease

Explanation:

Why is Graphite soft

Answers

Answer:

Graphite is soft because it has weak inter molecular forces between its layers.

the number of protons will tell you what elements it is. T or F plzz help​

Answers

Answer:

True

Explanation:

There are two ways to tell elements apart from each other: the atomic number or the number of protons. The atomic number tells the number of protons in the element.

For example:

There are two given elements. One has 3 protons and an atomic number of 3 while the other has 7 protons and an atomic number of 7. Which one is Lithium?

Lithium has an atomic number of 3, which means it has three protons, which means Lithium is the one with 3 protons.

What element is the only Noble Gas in the s-block?

Answers

Answer:

Helium

Explanation:

Answer:

helium i guess i m not sure

K+ Cl2 → КСІ balance equation​

Answers

Answer: 2K + Cl2 —> 2KCl

3. The presence of the same
a. fossils
b. rocks
on several continents supports the hypothesis of continental drift.
c. neither a norb
d. both a and b

Answers

Answer:

with someone or in the same place as them

Explanation:

What all indicates a CHEMICAL change? *
A Solid melting into a liquid
After the change the substance is still reactive with oxygen
One substance becomes two new substances
The melting point was 100 deg C but after the change the melting point was 256 deg
C.

Answers

one substance becomes two new substances

The rows in the periodic table are called periods.
What is true about elements in the same period?

Answers

Answer:

elements in the same period have the same number of shells

the period number the element is in, that is the number of shells it has.

BE FIRST TO ANSWER PLEASEEE ASAP! :D

Answers

Answer:

I want to say E or B

Explanation:

A star's mass determines the —
A) shape of a Star
B) location of a star
C) length of its lifecycle
D) galaxy it belongs to

Answers

It’s either A or C sorry I can’t help more

Egg + Heat

Proof of a Chemical Reaction

Answers

Answer:

Water+Heat

proof of physical reaction

Explanation:

Chemical reactions are reactions that can't be undone ex cooking and egg.

Physical reactions are reactions that can be undone ex boiling water.

Answer:

Egg + Heat = Chemical Change

Explanation:

This is a chemical change because it cannot be undone. Once it changed its form you could not revert it back to its original self.

I hope this helps you! :)))))

Identify the atom
H₄
CH₄
N

Answers

Answer:

Organic Molecule.

Explanation:

Any molecule with C atoms and H atoms are organic molecules in chemistry.

Examples could be C₄H₅, C₉H₁₈O₆, C₅H₁₂N.

organize the following elements in order of increasing atomic radius (Ge, He, Sr, O, Ba)

Answers

Answer:

He

O

Ge

Sr

Ba

Explanation:

An atom gets larger as the number of electronic shells increase; therefore the radius of atoms increases as you go down a certain group in the periodic table of elements.

In general, the size of an atom will decrease as you move from left to the right of a certain period.

Find the percent of oxygen in CaClO3)2 Show your work

Answers

So in calcium chlorate, there is one calcium, 2 chlorines, and 6 oxygens. To find the percent of oxygen in the compound, find the weight of the oxygen and divide it by the total weight of the compound:

weight of oxygen (95.94g/mol) / weight of entire compound (206.98g/mol)
= 0.4635

Finally, to convert this to a percentage you multiply it by 100

0.4635 x 100 = 46.35% Oxygen by mass

what is the first step of scientific method A.Hypothesis
B. question
C.control
D.procedures​

Answers

Answer:

B

Explanation:

Question. You need to ask questions before you can set up to perform an experiment.

explain how to balance the chemical equation, KClO3 ⟶ KCl + O2 and include all steps

Answers

The balance of chemical equation : 2KClO₃ ⟶ 2KCl + 3O₂

Further explanation  

Equalization (balance) of chemical reactions can be done using variables. Steps in equalizing the reaction equation:  

1. gives a coefficient on substances involved in the equation of reaction such as a, b, or c, etc.  2. make an equation based on the similarity of the number of atoms where the number of atoms = coefficient × index (subscript) between reactant and product  3. Select the coefficient of the substance with the most complex chemical formula equal to 1  

Reaction

[tex]\tt KClO_3\Rightarrow KCl+O_2[/tex]

1. Coefficient

KClO₃ ⟶ aKCl + bO₂

2. Equation

K ⇒ left =1, right=a ⇒a=1

Cl⇒ left =1, right=a ⇒a=1

O ⇒ left = 3, right = 2b ⇒3=2b, b = 1.5

The equation turns into :

KClO₃ ⟶ KCl + 1.5O₂

multiplied by 2

2KClO₃ ⟶ 2KCl + 3O₂

What mass of ethanol will All
a 250.0 ml container if its
density is 0.789 g/ml?

Answers

Answer:

The answer is 197.25 g

Explanation:

The mass of a substance when given the density and volume can be found by using the formula

mass = Density × volume

From the question

volume = 250 mL

density = 0.789 g/ml

So we have

mass = 250 × 0.789

We have the final answer as

197.25 g

Hope this helps you

What is the difference between a compound and a mixture?



Group of answer choices

A compound is just a mixture of elements.

A mixture can be physically separated into its components; a compound cannot be physically separated into its components.

The components of a mixture do not have the same properties individually as they do when mixed.

A compound can be physically separated into its components; a mixture cannot be physically separated into its components.

Answers

Answer:

Compound are substances which can be formed by chemically combining two or more elements. Mixtures are substances that are formed by physically mixing two or more substances. Compounds can be of three types, which are: covalent compounds, metallic compounds and ionic compounds.

Answer:

The answer is a mixture can be physically separated into its components; a compound cannot be physically separated into its components.

PLZZ HELP!!
An atom has atomic number 11 and mass number 23. How many electrons does the atom have?
23
22
O 12
O 11

Answers

Answer:

12

Explanation:

23-11, why?, because, the difference between atomic and mass number is the neutron number which most a times is equivalent to the electron number.

I need help with that box

Answers

I hope this helps.

the first line would be SN, 50, 50, 69

second line would be PT, 78, 78, 117

third line would be MO, 42, 42, 54

fourth line would be NI, 28, 28, 31

fifth line would be U, 92, 92, 146

Why were enslaved Africans in high demand in the southern colonies?

Answers

Answer:

Slaves were in high demand in the southern colonies because they were the main source of labor. ... Bacon and others colonists wanted to take the Natives land.

Explanation:

HOPE THIS HELPED ❤✨

Slaves were in high demand because they were the main source of labor meaning they would do all of their owners work and without the slaves it was hard for them to keep up with their house, farm, work etc
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