Which of the following elements is the least reactive metal? Sodium, Rubidium, Chlorine, and Magnesium.​

Answers

Answer 1
First off chlorine is not a metal so you can ignore that one.

Sodium and Rubidium are in group 1 of the periodic table and Magnesium is in group 2.

Group one metals are more reactive than group two because it is harder for the group two metals to lose their 2 valence (outer most) electrons.

As you go down group 1 there is an increase in the reactivity this is because as you go down there is an increase in the atomic radius which leads to more shielding. This weakens the electrostatic forces of attraction making it easier to lose the outermost electrons, therefore they are more reactive.
Answer 2

Answer:

Magnesium

Explanation:

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Related Questions


EASY QUESTION!!!! 12 POINTS!!!


Neutron____Neutron

push apart
pull together

Answers

Answer:

Neutron pull together Neutron

AR
1. The table below lists some properties of a sample of lauric acid.
Property
Value
hf
Volume
hc
2
Mass
Boiling point
79.6 ml
70.022 g
222°C
Number of
moles
0.350
RT
Which of these is an intensive property of this sample?

Answers

Answer:

Boiling point

Explanation:

We define extensive properties as those properties that change with the amount of the substance present. These include;  mass, weight, and volume.

Intensive properties, on the other hand, do not change with the amount of the substance present. They are characteristic of the substance. They include; color, melting point, boiling point, electrical conductivity, and physical state at a given temperature.

Which element in Period 3 has the largest atomic radius?

Answers

Answer:

sodium

Explanation:

If the statement is true, select True. If it is false, select False.

The forces between molecules are much stronger than the forces between ions.

True
False

Answers

The forces between molecules are much stronger than the forces between ions.

➜ True

The actual relative strengths will vary depending on the molecules involved. Ionic bonding and covalent bonding will always be stronger than intermolecular forces in any given substance.

Ok ok I know this isn’t about schoolwork but can ppl please comment how to ask a boy out?

Answers

just be straight up with him, and don’t overthink it too much. Also don’t beg him if he says he doesn’t feel the same :)

Answer:

depends on the boy but don't try to hard be cool and just go for it 90 percent of the time they'll say yes

Explanation:

How many more valence electrons does this atom need to fulfill the Octet
Rule? (Urgent need help)

Answers

Answer: The octet rule is a bonding theory used to predict the molecular structure of covalently bonded molecules. According to the rule, atoms seek to have eight electrons in their outer—or valence—electron shells. Each atom will share, gain, or lose electrons to fill these outer electron shells with exactly eight electrons.

Explanation:

Which of the following is an example of a decomposition reaction?

Answers

Answer:

B is a decomposition reaction

The chemical equation which represents decomposition reaction is 2 NaCl[tex]\rightarrow[/tex] 2 Na + Cl₂.

What is chemical equation?

Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.

A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .

The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.

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Which of the following is NOT a physical property?

A. melting point
B. state of matter
C. density
D. flammability

Answers

Answer:

i think.its D ddddddddddddd

What element is in period 6 with 2 valence electrons?

Answers

Answer:

Barium

Explanation:

I think that's the answer

The element in period 6 with 2 valence electrons is Barium.

The periodic table has been organized into periods and groups. The period is in an horizontal arrangement while group is vertical arrangement.

The elements that can be found in period 6 are Beryllium, Magnesium, Calcium, Strontium, Barium etc.

Elements in the same group have the same number of valence electrons. This means that elements in group 2 have 2 valence electrons.

Barium possess two valence electrons because it is in group 2 and it is also in period 6. Therefore, the element in period 6 with 2 valence electrons is Barium.

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MULTIPLE CHOICE QUESTION URGENT URGENT URGENT PLS HELP ME

Answers

Answer:

The answer is 4

Explanation:

plz give me brainliest :)

What are ionic compounds ​

Answers

ionic compound is a chemical compound composed of ions held together by electrostatic forces termed ionic bonding

What is the primary result of a fission
reaction?
(1) conversion of mass to energy
(2) conversion of energy to mass
(3) binding together of two heavy nuclei
(4) binding together of two light nuclei

Answers

Answer:

(1) conversion of mass to energy

Explanation:

Nuclear fission: In nuclear fission, an unstable atom splits into two or more smaller pieces that are more stable, and releases energy in the process. The fission process also releases extra neutrons, which can then split additional atoms, resulting in a chain reaction that releases a lot of energy.

The primary result of a nuclear fission reaction is the conversion of energy to mass.

What is nuclear fission reaction?Nuclear fission reaction is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The nuclear fission reaction produces gamma photons and releases a very large amount of energy even by the energetic standards of radioactive decay.

Hence, option 2 is the answer.

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Electric circuit are a pathway for ____ to flow

A.) Neutrons

B.) Protons

C.) Matter

D.) Electrons

Answers

Answer:

Electrons

Explanation:

The source that gives the voltage (force) causes the electrons to move.

Answer:

The answer is Electron

Explanation:

What is a way in which nuclear fusion is used?
O Space stations
O atomic bombs
O Nuclear power plants
O In stars

Answers

B. Atomic bombs did this in school

What two things determine the gravity of an object?
A. mass & distance
B. mass & weight
C. density & mass
D. distance & weight

Answers

Answer:

A mass and distance

Explanation:

A solution is made by dissolving 0.0503 kg of biphenyl (C12H10) in
350.0 mL of benzene (C6H6).
What would be the osmotic pressure (in atm) of this solution at 40.0
°C? (The density of benzene is 0.877 g/mL.)

Answers

Answer:

Letter A po

Explanation:

yanffdddddd

when hydrogen atom absorbs a photon, and an electron moves level 1 to level 2, what happens to the energy of the atom?

Answers

Answer:

When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. One way of thinking about this higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon).

Explanation: pls mark brainliest :))

Which option listed above represents the correct way the layers would form? Explain
your choice by describing which chemical or physical property determines the
layering.

Answers

Answer:

option 1 pls mark bbrainliest

Explain why the mass of carbon must be decreasing in a different step of slow carbon cycle based on the increase in atmospheric CO2

Answers

Answer:

Carbon flows between the atmosphere, land, and ocean in a cycle that ... Coal and other fossil fuels are a convenient source of energy, but when ... If carbon dioxide rises in the atmosphere because of an increase in ... However, the slow carbon cycle also contains a slightly faster component: the ocean.

Explanation:

I got you fam

When an egg is boiled in a pot of water on the stove, there is more than one kind of heat transfer. Heat is transferred from the stove to the pot directly since they are physically touching. Heat is also transferred from the pot to the egg, carried through the water.

Answers

Answer:

Stove → Pot = conduction, Pot → Egg = convection.

Explanation:

There are three ways in which heat is being transferred from one medium to the other and the means are; radiation, conduction and convection heat transfer.

Radiation is the process in which heat is being transferred through emission in form of electromagnetism. Conduction heat transfer Is the process in which heat is being transferred through contact that is two bodies touching each other. Convection heat transfer is the kind of heat that happens through gases.

Since the heat from the stove touching the pot is the conduction heat transfer.

After the water has been heated up, the gas from the water makes the convection heat transfer.

plsss help
will mark BRAINLIEST

Answers

Answer:

c

Explanation: just a chemachal

Which of the following combinations of quantum numbers (n, l, ml, ms) do NOT represent permissible solutions of the Schrodinger equation?

6, 5, -5, ½

6, -5, -1, ½

8,2,2, ½

All are allowed

9, 8, -4, ½

Answers

Explanation:

6, -5, -1, 1/2 is wrong because the angular momentum quantum number cannot be negative.

second one is wrong since it can’t be negative

Based on the chemical formula and state of matter, which of these substances will conduct electricity?

CuSO4(s)

CuSO4(aq)

C5H12(l)

CO2(g)

Answers

Answer:

CuSO4(aq)

Explanation:

The aqueous form of copper sulfate will conduct electricity.

The Solid form will not be a good conductor.

C₅H₁₂ will not conduct electricity

CO₂ will not conduct electricity

Copper sulfate is an ionic compoundIn aqueous solutions or molten forms, ionic compounds can conduct an electric current using free mobile ions as carriers. This way, they are electrolytes. In solid state, the ions are arranged into a crystal lattice and will not conduct a current of electricity.

How do HOT AIR BALLOONS work when ascending and descending explain in terms of gas behavior?

Answers

Answer: Animation: Burning gas makes the air inside the balloon less dense, producing an upward force or lift. 1) A hot air balloon stays on the ground (or descends) when the air inside it is too cool. ... 3) When the air is hotter still, the balloon rises because the lift force is greater than the weight.

Explanation:

Common sense

1. All ___matter______ is made of atoms that cannot be ______________________ or ____________________. 2. All _______________ of a given __________________ are ___________________ in mass and __________________.

Answers

Answer:

All the matter that is made of atoms that cannot be broken or beaten into thin sheet .2All matters of a given book are in mass and mixture

Which best explains the difference between a monomer and a polymer?
A monomer is larger than a polymer.
A monomer contains carbon and a polymer does not.
A polymer contains carbon and a monomer does not.
A polymer is larger than a monomer.

Answers

The difference between the monomer and a polymer should be that monomer should be larger than a polymer.

Difference of monomer and a polymer?

The monomer represent the molecule type where it has the capability for chemically the bond along with the other molecules with respect to the long chain. While the polymer should represent the chain of the non-specified the no of monomers.

Also, it represent the building blocks of polymers that contain more complex type of molecules

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Answer:

A

Explanation:

What will a medium mass star become at the very end of its life cycle

Answers

Once it becomes the white dwarf it eventually runs out of fuel and dies as a black dwarf.

What Group is this element in?

Answers

Answer:

sodium

Explanation:

In the following reaction, which element or compound is the oxidizing agent?

I NEED HELP ASAP ​

Answers

Answer:

[tex]O_{2}[/tex] is the oxidizing agent

Explanation:

An oxidizing agent is an element in a reaction that accepts the electrons of another element. It is typically hydrogen, oxide, or any halogen. In this case, it is oxygen. The answer is 02.

Answer:

i think it's 02 i might be wrong

Explanation:

How does the quantum theory of atoms explain the nature of the emission-line spectrum of hydrogen?

Answers

Energy takes on discreet values, we notice that only certain values of energy are allowed hence the line spectrum of the hydrogen atom.

According to the Bohr model of the atom, energy levels within the atom is quantized. Energy quantization implies that energy occurs in discreet packets and do not take on intermediate values.

Because energy takes on discreet values, we notice that only certain values of energy are allowed hence the line spectrum of the hydrogen atom.

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