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3 years ago

2.

Physics

1 answer:

Julli [10]3 years ago

5 0

Answer: C. Metals are found on the left side of the periodic table.

Explanation:

The periodic table contains vertical columns called as groups and horizontal rows called as periods.

Period 2 contains 8 elements which are lithium, beryllium , boron , carbon, nitrogen, oxygen , fluorine and neon. Only Lithium and beryllium are metals.

Group 18 contains all the noble gases which are all non metals.

Metals are the elements which loose electrons easily and form positive ions. Non-metals are the elements which can gain electrons easily and form negative ions.

Metals are present on left side of the periodic table and as we move to right side of the periodic table , the metallic character decreases and thus non metals are found on the right side of the periodic table.

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True or False?

WINSTONCH [101]

Answer:

true is the answer of the question

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3 years ago

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Brainliest if correct Question 2 of 10

Troyanec [42]

Answer:

b and d

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3 years ago

Learning Task 3: Read the characteristics of mixtures given in the second column. Identify if it is homogeneous or heterogeneous

madreJ [45]

1. Components can be separated by physical means [heterogenous]

2. The additive component is so finely dispersed in the main ingredient such that it can't be seen [homogenous]

3. Particles are uniformly distributed [homogenous]

4. The substances are identified in different phases [heterogenous]

5. Particles are non-uniformly distributed [heterogenous]

A homogenous mixture is a type of mixture in which the composition is uniform throughout the mixture.

Characteristics of a homogenous mixture:

the mixture is uniform
the composition is the same
it consists of one phase

A heterogenous mixture is a type of mixture in which the composition of the mixture is not uniform

Characteristics of heterogenous mixture include;

it contains two or more ingredients or phases.

different phases mixed together, which are physically separated

samples obtained from different parts of the mixture may have a different composition

In the given characteristics of the mixture in the question we can classify them as follows;

1. Components can be separated by physical means --heterogenous

2. The additive component is so finely dispersed in the main ingredient such that it can't be seen --- homogenous

3. Particles are uniformly distributed ---- homogenous

4. The substances are identified in different phases ---- heterogenous

5. Particles are non-uniformly distributed ---- heterogenous

Learn more here: brainly.com/question/18224061

6 0

3 years ago

The acceleration due to gravity vector is always in the ____ direction.

finlep [7]

It goes in the downward direction

4 0

3 years ago

Is the wavelength comparable to the size of atoms?

Helen [10]

It totally depends on what kind of wave you're talking about.

-- a sound wave from a trumpet or clarinet playing a concert-A pitch is about 78 centimeters long ... about 2 and 1/2 feet. This is bigger than atoms.

-- a radio wave from an AM station broadcasting on 550 KHz, at the bottom of your radio dial, is about 166 feet long ... maybe comparable to the height of a 10-to-15-story building. This is bigger than atoms.

-- a radio wave heating the leftover meatloaf inside your "microwave" oven is about 4.8 inches long ... maybe comparable to the length of your middle finger. this is bigger than atoms.

-- a deep rich cherry red light wave ... the longest one your eye can see ... is around 750 nanometers long. About 34,000 of them all lined up will cover an inch. These are pretty small, but still bigger than atoms.

-- the shortest wave that would be called an "X-ray" is 0.01 nanometer long. You'd have to line up 2.5 billion of those babies to cover an inch. Hold on to these for a second ... there's one more kind of wave to mention.

-- This brings us to "gamma rays" ... our name for the shortest of all electromagnetic waves. To be a gamma ray, it has to be shorter than 0.01 nanometer.

Talking very very very very roughly, atoms range in size from about 0.025 nanometers to about 0.26 nanometers.

The short end of the X-rays, and on down through the gamma rays, are in this neighborhood.

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4 years ago