Which pair of symbols represents nuclei with the same number of neutrons?
A. 56 Co and 580
B. 57Co and 58Ni
c. 57Fe and 58 Ni
D. 57Mn and 57Fe

Answers

Answer 1

Answer:

B

Explanation:

Mass number  = number of neutrons + number of protons

Atomic number is the number of protons in the nucleus.  

58Ni   : 58 is the number of neutrons + number of protons

atomic number of Ni is 28.  Thus,  58 -28 = 30 neutrons

57Co ;  57 is the number of neutrons + number of protons

number of Co is 27. Thus, 57 – 27  = 30 neutrons


Related Questions

What is the amount of mass in each given unit of volume?

Answers

Answer:

Each volumn is different and therefore has a specific and unique mass.

Which statement best explains why the air pressure is greater at the poles than at the equator

Answers

Answer:

At the equator, the altitude is lower, and also because of the direct heating of sun rays on the surface, the temperature is much higher than at the poles. This makes the air near the surface hot and lighter and hence it rises up which results in lower air pressure.

Explanation:

Plz give me brainliest .-.


How many atoms are in the following formula?
3Al2O3

Answers

Answer:

15 atoms total

Explanation:

2 Al atoms + 3 O atoms = 5 Al2O3 atoms

5 Al2O3 atoms * 3 = 15

another way to do it is:

2 Al atoms * 3 = 6 Al atoms

3 O atoms * 3 = 9 O atoms

6+9 =15 atoms total

The number of atoms in the given 3Al₂O₃ is 15 atoms.

What are atoms?

Atoms are the smallest unit of every matter. It contains charged particles present inside the atoms. They are electrons, protons, and neutrons. Atoms are of four types, description, isotopes, radioactive, and ions.

These atoms are the ions, that are charged, and the charged ions make bonds with each other to form compounds. Aluminum oxide is a compound that is formed by combining aluminum and oxygen atoms.

The compound is 3Al₂O₃

This means there are three moles of aluminum, and three moles of oxygen.

2 Al atoms + 3 O atoms = 5 Al₂O₃ atoms

5 Al₂O₃ atoms x 3 = 15

The elaborative way is:

2 Al atoms x 3 = 6 Al atoms

3 O atoms x 3 = 9 O atoms

6 + 9 =15 atoms total

Thus, the number of atoms is 15 atoms.

To learn more about atoms, refer to the link:

https://brainly.com/question/25620560

#SPJ2

-79.6 -80 -81.2. is the correct answer

Answers

um what -80 lol what

A young girl has blue eyes.
Which statement explains how the young girl inherited her blue eye color?
A. The girl received proteins from her mother and father that coded for blue eye color.
B. The girl received blue pigments from her mother and father that formed her blue eye color.
O c The girl received cells from her mother and father that blended together to form her blue eye color.
D. The girl received chromosomes from her mother and father containing DNA that coded for blue eye color.

Answers

Answer:

D

Explanation:

( I hope that this helps )

Answer:

The answer is d

Explanation:

arrangement of small particles in substance is​

Answers

Answer:

The particle model represents particles by small, solid spheres.It describes the arrangement, movement and energy of particles in a substance. The model can be used to explain the physical properties of solids, liquids and gases.

Answer:

The particle model represents particles by small, solid spheres. ... It describes the arrangement, movement and energy of particles in a substance. The model can be used to explain the physical properties of solids, liquids and gases.

Explanation:

Which components are part of all scientific investigations? Check all that apply.

Answers

Answer:

Steps of a scientific investigation include 1. make observation

2. ask a question

3. form a hypothesis

4. test the hypothesis

5. analyze results

5 , drawing conclusions,

6. and communicating the results

Can someone help me quickly?

Answers

The first one is correct :)

Is steam a water , oxygen or hydrogen molecule ?

Answers

it’s a water molecule

Answer:

In thermolysis, water molecules split into their atomic components hydrogen and oxygen. For example, at 2200 °C about three percent of all H2O are dissociated into various combinations of hydrogen and oxygen atoms, mostly H, H2, O, O2, and OH.

Explanation:

Write the correct electron configurations for the following:
ments
ions
• Na (atomic # 11)
• Fe (atomic # 26)
• As (atomic # 33)
• F (atomic #9)
• Co (atomic #27)
• Ag (atomic # 47)
• K (atomic # 19)
• Cu (atomic # 29)
• Si (atomic # 14)

Answers

Answer:

Ag

Explanation:

atomic 33 because it what what sence

Na- 1s^2 2s^2 2p^6 3s^1

Fe- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^6

As- 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^3

F- 1s^2 2s^2 2p^5

When exposed to very high temperatures, metals like iron can be turned into fluids that flow and can be poured into molds. What happens within the iron to allow it to flow?

A) The energy of the solid decreases, and the particles begin to collide with high frequency

B)The energy of the solid increases, and the particles begin to slide past each other

C)The solids collide at an increasing rate until reaching equilibrium energy

D)The particles vibrate about equilibrium in an effort to minimize energy

Answers

Answer: B) The energy of the solid increases, and the particles begin to slide past each other.

Explanation:

The energy of the solid matter is required to be increased so that molecules of the solid matter get separated from each other and an transition from solid matter to liquid matter occurs. The liquid components of the matter will slide past each other as they have obtain energy for fluidity. The liquid iron can be molded into any shape and the energy decreases considerably.

A rock mass is 100g. Determine the density of the rock if it has a volume of 20cm3.

Answers

Answer:

The answer is 5.0 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 = 100 g

volume = 20 cm³

We have

[tex]density = \frac{100}{20} = \frac{10}{2} \\ [/tex]

We have the final answer as

5.0 g/cm³

Hope this helps you

An unknown metal cation (alias, M) contains 26 total electrons. It forms an ionic compound
with sulfide with the formula MS. What is the symbol of the cation?
*When writing the cation, write the symbol, put in 1 space, then the charge.
Example: Fe2+ would be written Fe 2+

Answers

Answer:

sulfide is S 2- so it will be M 2+

How to separate these pure substance?if it is not possible, please write cannot be separate

Oxgen
Water
Gold
Carbon Dioxide
Carbon​

Answers

Answer:

Oxgen- cannot be separated

Water - chemical change

Gold - cannot be separated

Carbon Dioxide - chemical change

Carbon​ - cannot be separated

Explanation:

A pure substance, which can either be an element or a compound, contains only one type of such element or compound. In opposition to a mixture, pure substances cannot be separated by physical means.

- Elements as a pure substance cannot be separated because it contains only one type of atom. However, compounds contain two or more types of atoms, and hence, can only be separated into its individual atoms via chemical means.

In this question, oxygen (O2), Gold (Au) and carbon (C) are all elements and hence cannot be separated. Carbon dioxide (CO2) and water (H2O) are compounds because they contain two different atoms respectively, hence, can be separated into individual atoms.

3.4 moles of CO to liters?

Answers

3.4 moles of CO to liters is 76.2

Answer:

76.2 L of [tex]CO_{2}[/tex]

Explanation:

Converting the unit of moles to liters is very easy if you know the value of a mole to a liter. Remember that 1 mole is equivalent to 22.413962 L.

Step 1:

3.4 mol [tex]CO_{2}[/tex] x 22.413962 [tex]\frac{liters}{mole}[/tex] = ?

Step 2:

Cancel out the moles.

Step 3:

If you multiply 3.4 by 22.413962, the answer is 76.2

Step 4:

Don't forget to put the units every time you answer. So the answer is: 76.2 L of [tex]CO_{2}[/tex]


Highlands are:
A.The tall mountains thrown up by the impact of meteors with the Moon
B.Areas of lava flow
C.Impact sites of meteors on the surface of the Moon
D.The original surface crust of the Moon

Answers

Answer: C Usually grasslands and lowlands that are flat. The rest don’t make sense

If a p-wave arrives at 2:10:00 and the s-wave arrives at 2:15:20, how many kilometers from the epicenter is a location?

Answers

Answer:

2.67 x 10⁷km

Explanation:

Given parameters:

    Time of arrival of p-waves  = 2: 10: 00

    Time of arrival of s-waves = 2: 15: 20

Unknown:

Distance of wave from epicenter  = ?

Solution:

 To find the distance of the wave from the epicenter;

     Distance = 3 x 10⁸ x time interval

Time interval = Time of arrival of p-waves  - Time of arrival of s-waves

                       =  2: 10: 00 - 2: 15: 20

                       = 5min 20s

                       = 320s

Now, we need to convert the time to hrs;

        3600s  = 1hr

         320s  = [tex]\frac{320}{3600}[/tex]  = [tex]\frac{4}{45}[/tex]hr

So,

   Distance =  3 x 10⁸  x [tex]\frac{4}{45}[/tex]   = 2.67 x 10⁷km

Which statement about the masses of subatomic particals is true?
A. Electrons and neutrons have similar masses.
B. Neutrons and protons have similar masses.
C. Electrons, protons and neutrons have similar masses.
D. Electrons, protons and neutrons have very diffren´t masses.

Answers

the answer is D, all of them have very different masses

How much space does 2 x 10^22 atoms of copper take up?

Answers

Answer:

2.35mL

Explanation:

The amount of space a substance holds is its volume.

Density = mass (g) /volume (L)

Where;

mole = mass/molar mass

Since 1 mol of Cu contains 6.022 × 10^22 atoms.

There are 2 x 10^22/6.022 × 10^22 moles in 2 x 10^22 atoms of copper

2 x 10^22/6.022 × 10^22

2/6.022 × 10^(22-22)

0.332 × 10^0

0.332mol

Mole = mass/molar mass

0.332 = mass/63.5

mass = 63.5 × 0.332

mass = 21.08g

Density = mass/volume

Density of copper (Cu) is 8.96 g/cm³

8.96 = 21.08/v

V = 21.08/8.96

V = 2.35mL or cm³

An object accelerates 16.3 m/s2 when a force of 4.6 Newton’s is applied to it. What is the mass of the object?
A= .28 kg
B=74.98
C=3.8 kg
D= just to heavy to calculate

Answers

Answer:

A=0.28kg

Explanation:

FORCE=MASS * ACCELERATION

4.6=m*16.3

Then make m the subject.

m=4.6/16.3

m=0.28kg

Add 92.2 km to 9426 m and report the answer in
km.
92.2 km + 9426 m =
km
Help me plz

Answers

to convert m into km we have to divide it by 1000.so,

9426/1000=9.426km

92.2km+9.426km=101.626km.

Answer:101.6

Explanation:

Answer question number 6

Answers

It will be the first one

what is the formula for sulfuric acid

Answers

Answer:

H₂SO₄

Explanation:

Hope this helps!

Elements in group to are cold alkaline earth metals what is most similar about alkaline earth metals how many protons and neutrons they have which Chemical properties he have how many total electrons they have which period They have most often found in

Answers

Answer:

explanations below

Explanation:

The alkaline earth metals are the 6 chemical elements that can be found in group two of the periodic table. These elements have a lot of properties in common, in the sense that they are generally shiny, reactive at standard temperature and pressure and they are also silvery-white. The elements are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra)

These metals have two electrons at their orbits, which can be easily lost to form cations (with charge +2, and an oxidation state of +2)  

Below are some of their details

Name: Beryllium  

Number of Protons/Electrons: 4  

Number of Neutrons: 5  

Name: Magnesium  

Number of Protons/Electrons: 12  

Number of Neutrons: 12  

Name: Calcium  

Number of Protons/Electrons: 20  

Number of Neutrons: 20  

Name: Strontium  

Number of Protons/Electrons: 38  

Number of Neutrons: 50  

Name: Barium  

Number of Protons/Electrons: 56  

Number of Neutrons: 81  

Name: Radium  

Number of Protons/Electrons: 88  

Number of Neutrons: 138  

You are exploring a dormat volcano. As you walk, you first notice volcanic ash. As you continue in the same direction you find pieces of Lapilli. At the point where you find the lapilli are you closer or further away from the crater? Please answer this im desperate!

Answers

Answer:

you are closer

Explanation:

lapilli is formed from volcanic ash particles, which is something we saw earlier. the particles turn into lapilli when they get moist usually by the magma caused from eruptions

help please this is due at 2!!

Answers

Answer:

I believe the answer is C (3)

Explanation:

In an atom usually electrons number and protons number is equal.

Here lithium atom has three protons

So it has three electrons، too.

An organism that has two identical alleles (like two capital “T’s” or two lowercase “t’s” for example) is called

Answers

Answer:

h, o, m, o, z, y, g, o, u, s

Explanation:

h, o, m o z y g o u s- T, T or t, t

H, e, t e r o z y g o u s- T, t

I put the commas there so it would let me submit, because it said I put bad words for some reason...

ANSWER WITHOUT THE COMMAS LOL

Valence electrons determine blank

Answers

Answer:

the element's chemical properties and whether it may bond with other elements.

Explanation:

If N gains two electrons, which of the following elements would it be isoelectronic with
A) C
B) S
C) B
D) F

Answers

Answer: it’s D

yup!:)

If nitrogen gains two electrons, it becomes isoelectronic with fluorine.

There are five electrons on the outermost shell of nitrogen and a total of seven electrons in the atom. Recall that isoelectronic species are species that have the same number of electrons.

Fluorine is an element in group seventeen. There are nine electrons in fluorine. If nitrogen gains two electrons, it becomes isoelectronic with fluorine.

Learn more: https://brainly.com/question/12108425

Please he with c
Please I swear I am crying

Answers

Step 1: Subtract the atomic number from the mass number
Step 2: 12 - 6 = 6
Therefore the number of neutrons is 6
Because the number of neutrons is equal to the difference between the mass number of the atom and the atomic number
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