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3 years ago

Are the properties of Rubidium more similar to those of cesium or those of strontium?

Chemistry

1 answer:

fenix001 [56]3 years ago

5 0

More similar to Cesium

Explanation:

The properties of Rubidium are more similar to those of cesium compared to strontium.

Elements in the same group on the periodic table have similar chemical properties.

Rubidium and Cesium are located in the first group on the periodic table.
Other elements in this group are lithium, sodium, potassium and francium
Strontium belongs to the second group on the periodic table.
The first group have a ns¹ valence shells electronic configuration.
They are all referred to as alkali metals

Learn more:

Sodium brainly.com/question/6324347

Periodic table brainly.com/question/1704778

#learnwithBrainly

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A salt crystal has a mass 0.14mg,How many NaCl formula units does it contain?

klemol [59]

To determine the number of formula units in a sample of a compound you need to divide the number of grams by the formula mass. The formula mass of NaCl is 23 g/mol + 35.5 g/mol = 58.5 g/mol, and the number of grams of the sample is 0.14 mg * 1 g/ 1000 mg = 0.00014 g. Then the answer is 0.00014 g / 58.5 g = 2.30 * 10^ -6, which rounded to two significant figures is 2.4 * 10^ -6. So the answer is 2.4 * 10^-6 or 0.0000024

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3 years ago

How does gravity affect the inner planets? (site 2)

ikadub [295]

The presence of an atmosphere, temperature, and distance from the Sun do not affect a planet's gravity. Are the objects in the solar system still or are they in motion? The Sun's gravity pulls the planets in orbit around it, and some planets pull moons in orbit around them.

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3 years ago

Read 2 more answers

A solution contains 0.021 M Cl? and 0.017 M I?. A solution containing copper (I) ions is added to selectively precipitate one of

slavikrds [6]

Answer:

A precipitate will begin to form at [Cu+] = 3.0 *10^-10 M

The precipitate formed is CuI

Explanation:

Step 1: Data given

The solution contains 0.021 M Cl- and 0.017 M I-.

Ksp(CuCl) = 1.0 × 10-6

Ksp(CuI) = 5.1 × 10-12.

Step 2: Calculate [Cu+]

Ksp(CuCl) = [Cu+] [Cl-]

1.0 * 10^-6 = [Cu+] [Cl-]

1.0 * 10^-6 = [Cu+] [0.021]

[Cu+] = 1.0 * 10^-6 / 0.021

[Cu+] = 4.76 *10^-5 M

Ksp(CuI) = [Cu] [I]

5.1 * 10^-12 = [Cu+] [I-]

5.1 * 10^-12 =[Cu+] [0.017]

[Cu+] = 5.1 * 10^-12 / 0.017

[Cu+] = 3.0 *10^-10 M

[Cu+]from CuI hast the lowest concentration

A precipitate will begin to form at [Cu+] = 3.0 *10^-10 M

The precipitate formed is CuI

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3 years ago

How many helium atoms are there in a helium blimp containing 536 kg of helium? n = atoms?

Mariulka [41]

Answer:- $8.07*10^2^8atoms$

Solution:- It is a unit conversion where it asks to convert kg of He to atoms. We need to convert kg to grams, grams to moles and finally moles to atoms.

We know that, 1 kg = 1000 g

Molar mass of He is 4.0 grams per mole and 1 mole of an atom equals to Avogadro number of atoms.

The set up would be as given below:

$536kg(\frac{1000g}{1kg})(\frac{1mole}{4g})(\frac{6.02*10^2^3atoms}{1mole})$

= $8.07*10^2^8atoms$

So, there are $8.07*10^2^8atoms$ of He in it's 536 kg.

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4 years ago

17. Briefly describe the kind of bond that is formed when two atoms shown in A bond.

makvit [3.9K]

Answer:

An ionic bond is formed between the two atoms

Note: The missing figure in the question is found in the attachment below

Explanation:

Ionic bonding is a type of bonding which involves the transfer of electrons from from atom to another resulting in the formation of positive and negative ions.

The two atoms in A are a magnesium atom and and an oxygen atom.

The magnesium atom possesses two valence shell electrons which are transferred to the oxygen atom which has six valence shell electrons.

The transfer of two electrons from magnesium atom to oxygen atom makes it to become a positive ion with a charge of +2.

The oxygen atom receiving two extra electrons turns it to a negative ion with a charge of -2.

Electrostatic forces of attraction then attracts the two oppositely charged ions to each other, thereby forming an ionic bond between them.

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3 years ago