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grin007 [14]
3 years ago
14

Elements in the same column of the periodic table have what in common?

Chemistry
1 answer:
Kipish [7]3 years ago
8 0

Answer:

Elements in same column of periodic table have same properties.

Explanation:

The elements in the same group have same number of valance electrons thus have similar properties.

Consider the elements of group two i.e alkaline earth metals. All have two valance electrons and show similar properties.

Magnesium, barium, calcium etc.

All alkaline earth metals form salt with halogens.e.g,

Mg   +   Cl₂    →    MgCl₂

Ba    +   Br₂    →     BaBr₂

Mg   +   Br₂    →     MgBr₂

Ca    +   Br₂    →     CaBr₂

They react with oxygen and form oxides of respective metal.

2Mg   +   O₂   →    2MgO

2Ba   +   O₂   →    2BaO

2Ca   +   O₂   →    2CaO

these oxides form hydroxide when react with water,

MgO  + H₂O   →  Mg(OH)₂

BaO  + H₂O   →  Ba(OH)₂

CaO  + H₂O   →  Ca(OH)₂

With nitrogen it produced nitride,

3Mg + N₂     →  Mg₃N₂

3Ba + N₂     →  Ba₃N₂

3Ca + N₂     →  Ca₃N₂

With acid like HCl,

Mg + 2HCl  →  MgCl₂ + H₂

Ba + 2HCl  →  BaCl₂ + H₂

Ca + 2HCl  →  CaCl₂ + H₂

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Sodium is an inactive metal why​
Sphinxa [80]

Answer:

Inactive metals are inert metals that doesn’t react with most of the chemicals.They are highly resistant to oxidation and corrosion when exposed to moisture.

Explanation:

7 0
3 years ago
In the following reaction, which component acts as an oxidizing agent? 10 I− (aq) + 2 MnO4− (aq) + 16 H+ (aq) → 5 I2 (s) + 2 Mn2
antiseptic1488 [7]

Answer:

The oxidizing agent is the MnO₄⁻

Explanation:

This is the redox reaction:

10 I⁻ (aq) + 2 MnO₄⁻ (aq) + 16 H⁺ (aq) → 5 I₂ (s) + 2 Mn²⁺ (aq) + 8 H2O (l)

Let's determine the oxidation and the reduction.

I⁻ acts with -1 in oxidation state and changes to 0, at I₂.

All elements in ground state has 0 as oxidation state.

As the oxidation state has increased, this is the oxidation, so the iodide is the reducing agent.

In the permanganate (MnO₄⁻), Mn acts with +7 in oxidation state and decreased to Mn²⁺. As the oxidation state is lower, we talk about the reduction. Therefore, the permanganate is the oxidizing agent because it oxidizes iodide to iodine

3 0
3 years ago
What name is given to substances in which atoms of two or more elements are chemically combined?
anygoal [31]

Answer:

Compounds

Explanation:

Substances in which atoms of two or more elements are chemically combined are called compounds.

A compound is a substance formed when two or more elements are chemically joined.

5 0
3 years ago
Read 2 more answers
A solution is made
Anna11 [10]

Answer:

99.3%

Explanation:

The percent by mass of the solute can be expressed as:

  • % mass = \frac{MassSolute}{MassSolute+MassSolvent} * 100%

And for this problem:

  • Mass of Solute = Mass of sodium lithium chloride = 29 g
  • Mass of Solvent = Mass of Water

So to calculate the percent by mass first we need to <u>calculate the mass of water</u>, to do so we use its<em> density</em> (1 g/L):

  • 202 mL is equal to (202/1000) 0.202 L.

Density water = mass water / volume

  • 1 g/L = mass water / 0.202 L
  • Mass water = 0.202 g

Now we have all the data required to <u>calculate the % mass:</u>

  • % mass = \frac{29g}{29g+0.202g} * 100 % = 99.3%
3 0
3 years ago
Read 2 more answers
Why should the mole to mole ratio be a whole number ratio?​
muminat

Answer: The mole to mole ratio are the stoichiometric factors of the chemicals in your balanced reactions and are always in whole numbers. When we balance a chemical reaction, whole numbers are always used for easy convention.

Explanation:

7 0
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