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3 years ago

Which contains elements with similar properties in the periodic table? A. a period B. a column C. a row

Chemistry

2 answers:

Dima020 [189]3 years ago

7 0

That would be a column (called a group)

Semmy [17]3 years ago

6 0

Answer: Option (B) is the correct answer.

Explanation:

Elements of a group represent similar chemical properties because they contain same number of valence electrons which determines their reactivity.

Hence, elements of a group have same chemical nature or property.

A group is represented by a vertical column in a periodic table.

On the other hand, a period is represented by a horizontal line.

Thus, we can conclude that a column contains elements with similar properties in the periodic table.

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calculate atomic weight of silver which has two isotopes with the following properties : silver-107 (106.91 amu, 51.84% natural

Julli [10]

Answer: The atomic weight of silver is 107.87 amu

Explanation:

Mass of isotope silver-107 = 106.91 amu

% abundance of isotope silver -107 = 51.84% = $\frac{51.84}{100}=0.5184$

Mass of isotope silver-109 = 108.90 amu

% abundance of isotope silver-109 = 48.16% = $\frac{48.16}{100}=0.4816$

Formula used for average atomic mass of an element :

$\text{ Average atomic mass of an element}=\sum(\text{atomic mass of an isotopes}\times {{\text { fractional abundance}})$

$A=\sum[(106.91\times 0.5184)+(108.90\times 0.4816)]$

$A=107.87amu$

Thus atomic weight of silver is 107.87 amu

8 0

4 years ago

Does anyone know how to do this thanks

dem82 [27]

Answer:

I don't know how to do this

sorry I can't able to help you

Explanation:

$hii$

have a nice day ✌️

7 0

3 years ago

Name the type of bond in organic chemistry that corresponds to a glycoside bond

Semenov [28]

Answer:

covalent bond

Explanation:

The bond which is most common in the organic molecules is the covalent bond which involves sharing of the electrons between the two atoms.

Glycosidic bond, also known as glycosidic linkage is type of the covalent bond which joins carbohydrate molecule to other group that may not or may be a carbohydrate.

Glycosidic bond is the bond which is formed between hemiacetal or hemiketal group of the saccharide and hydroxyl group of compounds like alcohol.

5 0

3 years ago

Which statement concerning elements is true? (1) Different elements must have different numbers of isotopes. (2) Different eleme

Lana71 [14]

Answer:

(4) All atoms of a given element must have the same atomic number

Explanation:

Atomic number : It is defined as the number of electrons or number of protons present in a neutral atom.

However, when we talk about the atomic number of the ion, it is not equal to the number of electrons as electron can be gained or loosed.

This is why, more appropriately, the number of the protons which are present in the nucleus of the atom is called the atomic number.

Mass number is the number of the entities present in the nucleus which is the equal to the sum of the number of protons and electrons.

Mass number = Number of protons + Number of neutrons

<u>Thus, atomic number of an element is an unique property of the element and it's atom.</u>

8 0

3 years ago

Please help! Even if you only know one answer, it still helps. Describe the uses of the following safety equipment:

meriva

Answer:

eye wash: if you get chemicals in your eyes it helps to clean it

chemical/safety shower; If chemical gets on your skin everywhere you need to take a shower immediately so it helps you get rid of the chemicals on your skin

fire extinguisher: if something cashes on fire you need that to extenguish it

Explanation:

8 0

3 years ago