Atoms of mg combine with atoms of f to form a compound. atoms of which of the following elements combine with atoms of f in the same ratio?

al
li
cl
ba

The atom that will combine with F in the same ratio as it combines with Mg is Ba.

We must recall that F combines with atoms of  elements group 2 to form ionic compounds of the sort MX2 where M is the metal.

Mg and Ba all belong to group 2 hence they will form compounds with F in the ratio of 1:2

Therefore, the atom that will combine with F in the same ratio as it combines with Mg is Ba.

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1. B. Liquid
2. C. both A & B
3. C. Indefinite shape and definite volume
4. D. Sublimation
5. Its gotta either be B or D       its most likely D
6. A. Neutron
7. D.12
8. C. Ground State
9. C. Synthesis reaction
10. D. None of the above
11. Both A and C
12. A. 2
13. A. Element
14. A. Cu
15. D. Periods, Groups
16. B. Metals, Non-metals
17. A. F
18. D. None of the above
19. Either B or D
20. B. H-2.06% S-32.6% O-65.3%
21. A. Na2SO4
22. C. Combustion reaction
23. if I'm correct it should be C. Nitrogen Bromide
24. Sorry not sure what the answer is but your welcome I hope the rest of theses help!!

1. B. Liquid
2. C. both A & B
3. C. Indefinite shape and definite volume
4. D. Sublimation
5. Its gotta either be B or D       its most likely D
6. A. Neutron
7. D.12
8. C. Ground State
9. C. Synthesis reaction
10. D. None of the above
11. Both A and C
12. A. 2
13. A. Element
14. A. Cu
15. D. Periods, Groups
16. B. Metals, Non-metals
17. A. F
18. D. None of the above
19. Either B or D
20. B. H-2.06% S-32.6% O-65.3%
21. A. Na2SO4
22. C. Combustion reaction
23. if I'm correct it should be C. Nitrogen Bromide
24. Sorry not sure what the answer is but your welcome I hope the rest of theses help!!

four hydrogen atoms and one carbon atom to form methane (CH4)

Explanation: Study island

four hydrogen atoms and one carbon atom to form methane (CH4)

Explanation: Study island

Controlled experiment is an experiment which is designed to test a variable, which can be changed during the experiment.

Hence in this experiment, the importance of experiment is being tested, as it is added only in one set of plant.

A manipulated variable is an independent variable whose amount can be changed during an experiment.

Here the fertilizer is a manipulated variable.

Because theory is the most organised statement proved by a set of independent experiments.

Hypothesis is the initial idea on which basis different experiments are conducted. But if 1 experiment succeeded and it supports the hypothesis, hypothesis do not become a theory.

For a theory, different experiments are necessary which supports that hypothesis.

Density = 1.909 kg/m3

Given data:

Mass of the object = 42 kg

Volume of the object = 22 m3

Density of the object = ?

Solution

Density = mass/volume

Density =42/22 = 1.909

Density = 1.909 kg/m3

Hence the density of the object is 1.909 and its unit is kg/m3 which is system international unit of density.

Chlorine and water in swimming pool are mixed in such a way that there composition remains same throughout the mixture. And chlorine cannot be separated back from water. This is the homogeneous mixture.

Because physical change does not include composition change, it includes change in physical parameters. And in splicing tomato only change in shape is done.

Remaining questions are attached in the files.

Controlled experiment is an experiment which is designed to test a variable, which can be changed during the experiment.

Hence in this experiment, the importance of experiment is being tested, as it is added only in one set of plant.

A manipulated variable is an independent variable whose amount can be changed during an experiment.

Here the fertilizer is a manipulated variable.

Because theory is the most organised statement proved by a set of independent experiments.

Hypothesis is the initial idea on which basis different experiments are conducted. But if 1 experiment succeeded and it supports the hypothesis, hypothesis do not become a theory.

For a theory, different experiments are necessary which supports that hypothesis.

Density = 1.909 kg/m3

Given data:

Mass of the object = 42 kg

Volume of the object = 22 m3

Density of the object = ?

Solution

Density = mass/volume

Density =42/22 = 1.909

Density = 1.909 kg/m3

Hence the density of the object is 1.909 and its unit is kg/m3 which is system international unit of density.

Chlorine and water in swimming pool are mixed in such a way that there composition remains same throughout the mixture. And chlorine cannot be separated back from water. This is the homogeneous mixture.

Because physical change does not include composition change, it includes change in physical parameters. And in splicing tomato only change in shape is done.

Remaining questions are attached in the files.

1) Answer is: O and P.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

Oxygen (O) has greater electronegativity than phosphorus (P), because of that oxygen is partially negative and phosporus is partially positive.

Polyatomic ion is for example a molecule that has been ionized by gaining or losing electrons.

Oxygen and phosphorus can form ion PO₄³⁻.

2) Answer is: Cs and I.

Cesium (Cs) and iodine form salt cesium iodide (CsI) with ionic bond.

Ionic bond is the electrostatic attraction between oppositely charged ions (cations and anions).

Cesium (metal) lost one electron and form cation Cs⁺; iodine (nonmetal) gain one electron and form anion I⁻.

3) Answer is: KCl.

Potassium chloride is a salt with ionic bond.

Substances with ionic bond conduct an electric current in liquid and aqueous solutions, but not in solid state, because in liquids ions are mobile, contrary to solids where ions are fixed.

Dissociation of potassium chloride in water: KCl(aq) → K⁺(aq) + Cl⁻(aq).

4) Answer is: metal cation + nonmetal anion(–ide).

Name of this compound is calcium chloride.

Calcium chloride is a inorganic salt with ionic bonds between calcium and chlorine. It is a colorless crystalline solid at room temperature, highly soluble in water.

Calcium has oxidation number +2 and chlorine has oxidation number -2.

5) Answer is: AlCl₃.

Balanced chemical reaction: 2Al(s) + 3Cl₂(g) → 2AlCl₃(s).

Aluminium chloride is a salt with ionic bonds.

Aluminium (metal from group 13) has oxidation number +3 and chlorine (nonmetal from group 17) has oxidation number -1, chemical compound has neutral charge (+3 + 3 · (-1) = 0).

6) Answer is: carbon.

In molecule of methane (CH₄) all the atoms around the central element (carbon) are equivalent (four hydrogens) and it has a net dipole moment of 0 (vectors of dipole moments cancel each other, dipole moment is zero).

Methane (CH₄) is gaseous molecule with tetrahedrale structure, carbon is sp3 hybridized.

7) Answer is: Sodium chloride has a higher boiling point than sucrose.

Sodium chloride (NaCl) has ionic bonds and sucrose (C₁₂O₂₂O₁₁) has covalent bonds.

Sucrose or table sugar (C₁₂O₂₂O₁₁) composed of two monosaccharides. Monosaccharides glucose and fructose are linked with an ether bond between C1 on the glucosyl subunit and C2 on the fructosyl unit.

Boiling point of sodium chloride is 1413°C and sucrose decomposes at 186°C and form caramel.

8) Answer is:  It is a salt of three polyatomic ammonium ions and one polyatomic phosphate ion.

Polyatomic ammonium cation has charge of +1 and polyatomic phosphate anion has charge -3.

Ammounium ion is polyatomic because it is composed of one nitrogen and four hydrogen atoms.

Phospate anion is polyatomic because it is composed of one phosphorus and four oxygen atoms.

9) Answer is: S and O.

Electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

Oxygen (O) has greater electronegativity than sulfur (S), oxygen is partially negative and sulfur is partially positive.

Sulfur and oxygen can form, for example, SO₃²⁻ (sulfite anion) or SO₄²⁻ (sulfate anion).

10) Answer is: manganese(II) phosphate.

Manganese (II) phosphate (Mn₃(PO₄)₂) is an ionic salt.

Manganese has oxidation number +2 and phosphate has charge -3.

3 · (+2) + 2 · (-3) = 0; chemical compound has neutral charge.

Formula for manganese(III) phosphate  is MnPO₄.

Formula for manganese(I) phosphate  is Mn₃PO₄.