Metallic bonding is possible because the electrons

Answers

Answer 1

Answer: It is possible because the electrons in the energy level furthest from the nucleus delocalise, this leaves behind positively charged metal ions which are attracted to the negatively charged electrons that now move around the lattice freely

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Lenses can be found in a variety of objects. Which example does not contain a lens?A.
a magnifying glass

B.
a telescope

C.
chemical safety goggles

D.
a microscope

Answers

Answer:

chemical safety goggles do not have lens.

Explanation:

We use lenses to make a clear picture of anything.

They may be used to magnify an object.

Lens can be used in microscope to magnify the image of a microscopic object.

Telescope is used to see far objects, clearly.

Magnifying glass is a simple lens used for magnifying the image of any small ojbect or image or letter.

However chemical safety glasses uses simple glass.

c. chemical safety goggles.

Criteria for evaluating alternative solutions includes all of the following except :a. Appropriateness
b. Prediction
c. Adequacy
d. Efficiency

Answers

Criteria for evaluating alternative solutions includesall of the following except :

a. Appropriateness
b. Prediction
c. Adequacy
d. Efficiency

Criteria for evaluating alternative solutions includesall of the following except prediction. The answer is letter B.

A sample of gas at 300 K has a volume of 2.0 liters. At what temperature will the volume decrease to 1.0 liter if the pressure is kept constant?

Answers

Answer : The temperature will be, 150 K

Explanation :

Charles' Law : This law states that volume of gas is directly proportional to the temperature of the gas at constant pressure and number of moles.

$V\propto T$ (At constant pressure and number of moles)

or,

$(V_1)/(T_1)=(V_2)/(T_2)$

where,

$V_1$ = initial volume of gas = 2.0 L

$V_2$ = final volume of gas = 1.0 L

$T_1$ = initial temperature of gas = 300 K

$T_2$ = final temperature of gas = ?

Now put all the given values in the above formula, we get the final temperature of gas.

$(2.0L)/(300K)=(1.0L)/(T_2)$

$T_2=150K$

Therefore, the temperature will be, 150 K

pv/t=c
Therefore

v/t=c
2/300=1/t2
t2=150K

How are mixtures compounds and elements alike?

Answers

elements make up compounds, and when 2 or more compounds are chemically combined it makes a mixture or they are all matter, they have mass and occupy space

0.500dkg = ?g

HELP PLS!!!!

Answers

Answer:10 grams

Explanation:

What is 850 torr= ? Atm

Answers

850 torr. times 1 atm./760 torr. or 850/760. So, 1.11842105 atm.

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Which characteristics both generally decrease when the elements in Period 3 on the Periodic Table are considered in order from left to right?(1) nonmetallic properties and atomic radius(2) nonmetallic properties and ionization energy(3) metallic properties and atomic radius(4) metallic properties and ionization energy

Which change occurs during a nuclear fission reaction? (1) Covalent bonds are converted to ionic bonds. (2) Isotopes are converted to isomers. (3) Temperature is converted to mass. (4) Matter is converted to energy