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3 years ago

Which physical method can separate a mixture of steel ball bearings and marbles

Chemistry

2 answers:

Lana71 [14]3 years ago

6 0

Sorting is a method that could separate those materials

natita [175]3 years ago

4 0

Explanation:

A method with the help of which substances in a mixture can be separated from each other by physical means due to large difference in their sizes is known as sorting.

For example, mixture of steel ball bearings and marble will have different size of both marbles and steel ball bearings.

Hence, they are easily identifiable and thus, they can be easily separated from each other with the help of sorting.

Thus, we can conclude that sorting is the physical method that can separate a mixture of steel ball bearings and marbles.

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Help

Jet001 [13]

Answer:

Explanation:

The formation of ion occurs when an atom that is said to be neutral gains or losses electrons.

At the time it gains electrons, it is regarded that a negative ion (anion) is formed.

When it loses electron, it is regarded that a positive ion (cation) is formed.

Atomic number = No of protons and electrons occurring in a neutral atom.

Given that:

Protons = 14

electron = 18

Net Charge = no of proton - no of electron

= 14 - 18

= -4

Mass number = 14 + 15 = 29

So, the chemical symbol = $Si^{-4}$

For ion with

27 proton, 32 neutrons and 25 electrons

Net charge = 27 - 25

= +2

Mass number = 27 + 32 = 59

Thus, the chemical symbol = $Co^{+2}$

6 0

2 years ago

What does control mean in scientific method

saw5 [17]

Answer:

A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.A scientific control is an experiment or observation designed to minimize the effects of variables other than the independent variable. This increases the reliability of the results, often through a comparison between control measurements and the other measurements.

Explanation:

Let's all give it up for GOOGLE! where you can literally get an answer to something.

5 0

3 years ago

Ions form when atoms gain or lose protons. True or False.

stiv31 [10]

"Ions are formed when atoms lose or gain electrons in order to fulfill the octet rule and have full outer valence electron shells. When they lose electrons, they become positively charged and are named cations. When they gain electrons, they are negatively charged and are named anions." -Study.com

5 0

3 years ago

Read 2 more answers

Pleaseeeee helpp me ill mark brainliest Which explains why carbon (C) is such a versatile element?

butalik [34]

Answer:

it readily accept bonging with other elements

Explanation:

covalent donds-bond between the carbon atoms

ionic bonds-not sure but the extra carbon atom reacts with the other compound

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3 years ago

Manual handling of materials accounts for the primary source of injury in the workplace

irinina [24]

I think the statement is true. Manual handling of materials accounts for the primary source of injury in the workplace. This can be found in OSHA. Manual materials handling is the principal source of compensable injuries in the American work force, and four out of five of these injuries will affect the lower back.

7 0

2 years ago