All categories

3 years ago

Name two elements that have properties similar to those of beryllium and have average atomic masses higher than 130

Chemistry

1 answer:

sertanlavr [38]3 years ago

3 0

In the periodic table, elements of the same group are characterized by having the same similar properties.
So, first we will check the elements that lie within the same group as beryllium and then we will attempt to choose the elements with atomic mass higher than 130.

So, elements in the same group as beryllium are: magnesium, calcium, strontium, barium and radium.
Among these elements, we will find that:
radium has atomic mass of 226 amu
barium has atomic mass of 137.327 amu

Based on this, the two elements would be barium and radium.

You might be interested in

Can torque rods desaturate reaction wheels

katrin [286]

Yes, because of the reaction causes

4 0

3 years ago

What is the ratio of ions needed to produce neutral potassium chloride?

BlackZzzverrR [31]

Answer:

Explanation:

Why not

4 0

3 years ago

Read 2 more answers

F. give some examples of how it might be useful to know the melting or boiling points of a substance. think in terms of both sci

Delvig [45]

Hello!

To know the melting or boiling points of substances is extremely important:

-In a Scientific Setting, it would help identify and separate unknown substances, as the melting or boiling points are unique for each compound, and their determination is useful for identifying and separating them.

-In an Industrial Setting, it would help engineers to know the storage temperatures of compounds. Some compounds if stored at temperatures above their boiling points will evaporate and when stored at temperatures under their melting points will solidify. In some cases this behavior is undesired and knowledge of boiling and melting points is important.

Have a nice day!

6 0

3 years ago

the density of glycerin is 1.26 g/cm3. How many pounds/foot3 is this ? use the conversion rates of 454g/1 pound and 28,317cm3/1f

lyudmila [28]

Answer:

78.6 lb/ft³

Step-by-step explanation:

Let's do this in steps.

1. Convert grams to pounds

D = (1.26 g/1 cm³) × (1 lb/454 g)

= 2.775 × 10⁻³ lb/cm³

2. Convert cubic centimetres to cubic feet

D = (2.775 × 10⁻³ lb/1 cm³) × (28 317cm³/1 ft³)

= 78.6 lb/ft³

6 0

3 years ago

Given your results of Part III, predict the solubility of the following mixtures. Explain your answers. a) Methanol (CH,OH) in w

Setler79 [48]

Answer:

( a ) soluble

( b ) soluble

( c ) insoluble

Explanation:

Solubility is determined by the principle , "like dissolves like" .

i.e. , if a compound is polar then it will dissolve in a polar compound only , and

if a compound is non - polar then it will dissolve in a non - polar compound only .

Hence , from the question ,

( a )

Methanol and water as we know are both polar species , hence , according to the principle - soluble .

( b )

Hexane and cyclohexane

Both the species are polar species , hence , according to the principle - soluble .

( c )

Hexane and water

In this case ,

Hexane , is non polar and water is polar , hence , the mixture will be non soluble .

6 0

4 years ago