Which type of solid conducts electricity the best?

• Ionic

• Molecular

• Network

• Metallic

Answer:

Beta

Explanation:

Cause it emits in and become platinum so I believe  its beta

If Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.

Radiation in the  chemistry is a branch of nuclear chemistry which deals with the study of the chemical effects of radiation of alpha beta and gamma rays  on matter or any radioactive atom of periodic table.

This is very different from radio-chemistry as no radioactivity or radioactive rays needs to be present in the material which is being chemically changed by the radiation by removing proton from the nucleus.

Therefore, Iridium (element 77) emits radiation and becomes platinum (element 78) gamma rays of radiation is emitted by the element.

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Explanation:

Word Equation

Barium Chloride + Sodium Chromate = Sodium Chloride + Barium Chromate

1 mole of aqueous Barium Chloride [BaCl2] reacts with 1 mole of aqueous Sodium Chromate [Na2CrO4] to form 2 moles of aqueous Sodium Chloride [NaCl] and 1 mole of solid Barium Chromate [BaCrO4]

Answer:

Products are the species formed from chemical reactions. During a chemical reaction reactants are transformed into products after passing through a high energy transition state. This process results in the consumption of the reactants.

Explanation:

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Molarity is the molar concentration of the solution with respect to the moles and the volume. The molarity of the magnesium ion will be 0.339 M, and the Bromium ion will be 0.678M.

Molarity is the proportion of the moles of the solute to the volume in liters of the solution present. The compound magnesium bromide completely dissociates as:

MgBr² ⇆  Mg⁺² + 2Br⁻

The molarity of the magnesium ion will be equal to the M of the magnesium bromide and hence, will be 0.339 M.

The molarity of the bromide ions will be equal to two times the M of the magnesium bromide species and hence is 0.678 M.

Therefore, the molarity of the magnesium ion will be 0.339 M, and the Bromium ion will be 0.678M.

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The number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mole is 6.022 × 10²³

[tex]1\; molecule = \dfrac{1}{6.023 \times 10^2^3}[/tex]

The given number of moles are 4.2 x 10⁻⁴¹

[tex]Moles = 4.2 \times 10^-^4^1 \times \dfrac{1}{6.023 \times 10^2^3} = 6.973 \times 10^{-65}[/tex]

Thus, the number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

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Answer:

Water is weird because in solid state The molecules are combine then in liquid state they are wide apart.

Answer:

1.The electonic configuration of elements and their position in the periodic table are related to each other, From the electronic configuration of the elements, we can determine the period and the group to which the element belongs

Let's consider, sodium with atomic number 11 and k, l, and M shells have 2,8,and 1 electrons. since, there are 3 principal energy levels so we concluded sodium belongs to third period M Shell(valance shell) has only 1 electrons. so sodium belongs to group 1.

2. Entire D-block elements are known as Transition Elements.

3. Group 17 is the halogen group.

4. Main group of elements are...... 1,2, and 13 through 18.

5. Group 18 are the noble gas elements .

12. a). Smaller

b). Increases

c). More reactive

d). Softer

7. a). k › Ca › Ge › Br › Kr

b). Ra › Ba › Sr › Ca › Mg › Be

9. a). Ca(calcium) ion is smaller.

b). Cl(chlorine) atom is smaller.

c). Mg(magnesium) atom is smaller.

10. a). F(fluorine)

b). Sr(strontium)

c). Pb(lead)

d). At(Astatine)

Answer:

DNA sequence

Explanation:

When we say our DNA is different , we mean the sequence, or coding,  of DNA is different

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

Arrow head shows the direction of products formed in a reaction. so we can say that it denotes the direction of the chemical reaction. I.e From Reactant to Product.

so, the correct choice is B

Answer:

20,000 centigrams

Explanation:

Answer: As the substance changes from a liquid to a gas, bonds within its molecules almost dissapear and the average distance between them.

Explanation: