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tekilochka [14]
3 years ago
14

Describe how the properties of elements in the same group differ to the properties of elements in the same period

Chemistry
1 answer:
Fofino [41]3 years ago
5 0

Answer:

(a) (i) All the elements of a group have similar chemical properties because they have same no. of valence electrons in their outermost shell. (ii) All the elements of a period have different chemical properties because they have different no. of valence electrons in their atoms.

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Please help !!
Strike441 [17]
1) boiling points increase as molecular weight increase and vice versa. This is due to the increase in van der waals forces between molecules.
2) branching decreases the melting and boiling i.e increase in branching decrease boiling point and melting point. This is due to the fact that there are less point of contact between neighbouring molecules, so molecules are farther apart from each other, which means weaker van der waals(London forces) less energy is required to overcome these force of attraction.
3) In homolytic fission each of the fragment retain one of the bonded electron and radicals are made if the molecule is neutral. In heterolytic fission one fragment gets both bonding electron.
The energy for the heterolytic fission is higher because energy is not only needed to break the covalent bond but also to overcome the force of attraction between oppositely charged ions formed.
7 0
3 years ago
This drawing shows a human body system.
White raven [17]

Answer:

This question is incomplete

Explanation:

This question is incomplete because of the absence of the drawing  referred to in the question.

However, each option refers to a particular respiratory system and with the organs and the tissues mentioned here one can eventually identify which option is correct when the drawing is available.

A) The system described here is the cardiovascular system (or the circulatory system). This system involves the heart, blood vessels and the blood (which are what help in the transport of the materials mentioned in the question).

B) The system described here is the digestive system. This system involves the gastrointestinal tract and organs (that assist in the production/secretion or storage of chemicals that breakdown food into smaller pieces) such as the mouth, esophagus, stomach, small intestine, large intestine, rectum and the anus.

C) The system described here is the skeletal system. This system involves all the bones and joint in the body (the skeleton) which also helps in protecting organs in the body.

D) The system described here is the Endocrine system. This system involves several internal glands (such as the thyroid gland and the adrenal glands) in the body.

NOTE: Identify which organ and/or tissue is present in the diagram and use that to select the appropriate option from the description of each of the options provided above.

4 0
3 years ago
Read 2 more answers
1. Though Florida receives a lot of rainfall, only 1 percent remains available for people to use or drink. What happens to the r
timama [110]
<span>I am sure these answers are correct cause I've checked all of them. Here they are : 

1) The thing which might h</span>appen to the rest of the water is that 61% of that water leaves the ground through evapotranspiration and <span>38% will flow into the Atlantic Ocean. 
</span>
2) The four states which  receive drinking water from Florida are : <span> South Carolina, Georgia, Alabama, Mississippi 

3) The</span> reason why  people in Florida wanted to get rid of the water in certain areas is abundance of wetlands. I think there is one more, if it is acceptable I suggest you using this - frequent flooding.<span>

4) </span><span> The negative result of the changes which people made to get rid of the water is the first sign of </span>drought.

5) The thing that has been done to try and improve those mistakes was creating a tool which looked like a dam to prevent dfficulties with <span>navigating the state.

Hope that helps.</span>
8 0
3 years ago
Household items that are substance or mixture
monitta

Oil and water.

Lemon juice and tea.

Honey and tea.

Milk and chocolate.

Coffee and cream.

Cream and sugar.

Flour and butter.

Cereal and milk.

5 0
3 years ago
Read 2 more answers
Write the name for CH2.
finlep [7]

Answer:

Methylene. :)

6 0
3 years ago
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