Chemistry, 21.07.2020 14:01 yeicooyola3

State whether these items are metal or non metal, provide a reason why. 1. Electrical wires
2. Door handles
3. Radiator
4. Shelves in the chemical cupboard

please help!

Answers: 1

Show answers

Answers

Answer from: WampWamp8751

1. Metal.

Electrical wires are used to conduct electricity. Electrons have to flow through the wires in order to run the circuit. Only metals provide delocalized electrons that are free to move.

2. Metals, (usually)

Door handles should be strong that doesn't break easily. Metals are durable and corrosion resistant. Some metal alloys (like brass) are also found to be self-disinfecting.

3. Metals.

Radiators are usually used for emitting heat. Metals are good conductors of heat, which makes them great for making radiators.

4. Metals, (usually)

Most metals used for making chemical cupboard shelves are corrosion resistant, which causes less damage when chemical was spilled.

Answer from: danielle2814

1.Electrical wires - metals

They r used to conduct and transfer electricity from one place to another and therefor need to be made of metals [like copper] as they hv high electrical conductivity

Door handles - metals

They need to be corrosion resistant so dat they last longer and also there r smooth which makes it easier to hold them.

3.Radiator - metals

They r used for heat transformation and therefore they need to be made of metals as they hv high thermal conductivity [heat conductivity]

4.Shelves in the chemical cupboard - non metals

They need to be made of non metals as metals r reactive to chemicals and holes can be formed on them if a drop or two of chemicals fall on them.

Hope this helps

Pls mark my answer as brainliest :)

Answer from: Quest

the balanced equation for reaction of ca metal with o2 to produce cao is as below

2 ca+ o2→ 2 cao2

explanation

the reaction is balanced since the number of atoms in reactant side is equal to number of atoms in product side. for example they are 2 atom of ca in reactant side and 2 atoms of ca in the product side.

the process is a meet the requirement of redox reaction because : calcium is oxidized from oxidation state 0 to 2+ while oxygen is reduced from oxidation state 0 to 2-

Answer from: Quest

The answer would be true

Another question on Chemistry

Chemistry, 21.06.2019 21:30

Which substances have the lowest melting points: ionic covalent, or metallic

Answers: 1

Answer

Chemistry, 21.06.2019 23:50

Why do scientists look for patterns in the world? a. patterns can explain observations. b. patterns never change, no matter what. c. patterns are easy for scientists to detect. d. patterns are all the same, through all time.

Answers: 1

Answer

Chemistry, 22.06.2019 10:00

The tendency of water molecules to stick together is referred to as a) adhesion b) polarity c) cohesion d) transpiration e) evaporation

Answers: 1

Answer

Chemistry, 23.06.2019 03:30

In chemistry, the type of an atom (what element it is) is determined by: a) the number of protons it contains in its nucleus.b) the number of neutrons it contains in its nucleus.c) the number of protons it has in a cloud around the nucleus.d) the number of neutrons it has in a cloud around the nucleus.e) the number of electrons it exchanges with its neighbors.

Answers: 1

Answer

You know the right answer?

State whether these items are metal or non metal, provide a reason why. 1. Electrical wires
...

Questions

Engineering, 03.04.2020 21:40

A pipe 300 m long has a slope of 1 in 100 and tapers from 1.2 m diameter at the high end to 0.6 m diameter at the low end. Quantity of water flowing i...