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antoniya [11.8K]
3 years ago
8

Which element is classified as an alkali metal?

Chemistry
2 answers:
puteri [66]3 years ago
4 0
The alkali metals are a group (column) in the periodic table consisting of the chemical elements lithium<span> (Li), </span>sodium<span> (Na), </span>potassium<span> (K), </span>[note 1] rubidium<span> (</span>Rb), caesium (Cs<span>), </span>[note 2]<span> and francium (Fr). </span>
dusya [7]3 years ago
3 0

Explanation:

All the elements of group 1 in the periodic table are known as alkali metals. These are lithium (Li), sodium (Na), potassium (K), rubidium (Rb), caesium (Cs), and francium (fr).

Characteristics of alkali metals are as follows.

  • Alkali metals are soft and can be cut with a knife.
  • They are good conductors of heat and electricity.
  • They have only 1 electron in their outermost sub-shell.
  • They are very reactive.
  • Alkali metals are ionic in nature.
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Diamond has a density of 3.513 g/cm³. The mass of diamonds is often measured in "carats," where 1 carat equals 0.200
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The volume of a 1.86-carat diamond in cubic centimeters is 0.106 cm³

Given,

The density of a diamond is  3.513 g/cm³.

We have to find out the volume of a 1.86-carat diamond in cubic centimeters.

Convert the units of the diamond from carat to grams, we have:

(1.86 carats) x (0.200 g / 1 carat) = 0.372 g

The volume of the diamond is obtained by dividing the mass by the density, therefore using the formula, we get

                            v = m / d

                            v = 0.372 g / (3.51 g/cm³) = 0.1059 cm³

                       or, v = 0.106 cm³ (approx)

Therefore, the volume of a 1.86-carat diamond is approximately 0.106 cm³.

To learn more about the volume, visit: brainly.com/question/1578538

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2 years ago
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3 years ago
Take car traveling with constant speed travels at 150 km in 7200 a. what is the speed of the car?
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<span>Find the speed of the car in which it travels at 150 km in 7200 seconds.
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Which equation using element symbols correctly describes the reaction: "One molecule of methane plus two molecules of diatomic o
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