Question

Please answer questions 11 - 25 fast

Answer 1

1. As we know that to cut metal with a knife , the metal should be soft enough. Earth metals or the first group metals are soft metals. They have low density as compared to other metals of the entire periodic table. So they can be easily cut by a knife. Some of the soft earth metals are Lithium, Potassium and Sodium. Metals like Gold and Iron are hard and dense . They are malleable and ductile. They are very tough and it's nearly impossible to be cut with a knife. Proper machines and techniques are used to cut such metals.
2. So from the above explanation it is clear to us that earth metals like lithium .sodium and potassium can be cut with a knife.
3. Don't know
4. Transition elements are characterized by partially filled (n-1) d subshells.
5. Zinc is not a transition element as it has completely filled 3d subshell. 
6. The electronic configuration of zinc is [Ar]3d104s2.

Answer 2

Answer:

1.As we know that to cut metal with a knife , the metal should be soft enough. Earth metals or the first group metals are soft metals. They have low density as compared to other metals of the entire periodic table. So they can be easily cut by a knife. Some of the soft earth metals are Lithium, Potassium and Sodium. Metals like Gold and Iron are hard and dense . They are malleable and ductile. They are very tough and it's nearly impossible to be cut with a knife. Proper machines and techniques are used to cut such metals.

2.So from the above explanation it is clear to us that earth metals like lithium .sodium and potassium can be cut with a knife.

3.Transition elements are characterized by partially filled (n-1) d subshells.

4.Zinc is not a transition element as it has completely filled 3d subshell.  

5.The electronic configuration of zinc is [Ar]3d104s2.

20.while nonmetals tend to form anions. With one, two, or three valence electrons metals tend to lose electrons to achieve a noble gas configuration. (It would require more energy to gain the 5 – 7 electrons needed to fill their valence shell.)

15.Gold and silver are used to make jewellery because they are precious and expensive metals. Also, gold and silver last very long and look luxurious. It is easier to obtain metals from their oxides rather than from carbonates or sulphides. So the ore is first converted into an oxide..

Explanation: