Multiple Choice Questions 1. Which of the following statement best describes an atom? A. Protons and electrons are grouped together in a random pattern. B. Protons and electrons are grouped together in an alternating pattern C. A core of protons and neutrons surrounded by electrons. D. A core of electrons and neutrons surrounded by protons. 2. Table 5.10 shows the atomic mass of four stable isotopes of an element X. 119​

Answer:

Explanation:

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We have that The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .

The Mass atomic number is equal to its mass number of Hydrogen because it bears no Neutrons .The Hydrogen atom is devoid of any neutron.The hydrogen atom is made up of one electron and one proton.

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Answer:

1. A mental can be hammered into thin sheets and nonmetals are brittle

2. C vanadium

3. C silicon

4. B hydrogen does not have neutron

5. B francium has few valence electrons but they are in a higher energy level

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6. A.

protons = 31

neutron = 39

electron = 28

7. C isotopes that are naturally occurring and unstable always exist in trace amount

8. C atomic number

9. B electrons move freely in curved paths around the nucleus

10. A low energy alpha particles passing through a field of high mass number particles

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11. C on the right side of the periodic table

12. A nitrogen

13. A fluorine , chlorine , and iodine

14. C an ionic bond is likely because they will want to give away two valence electrons in order to become stable

15. D -2

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16. The change in atomic number from 10 to 11

implies a change from a noble gas to a highly

reactive group 1 element. As a result of this,

reactivity increases. The atomic number of an element tells us the group to which the element belongs in the

periodic table.

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An atomic number of 10 shows a filled outermost shell which is characteristic of the noble gases. Hence, as we move from this atomic number of

10 to an atomic number of 11, reactivity increases

positively. Atomic number 11 corresponds to a highly

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17. The periodic table shows a correlation between the strength of the ionic connection and the position of the elements on the table. Because metals are positively charged and non-metals

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are negatively charged, if you start on the left side of the periodic table and work your way right, the ionic charge and radius will gradually decrease and the charge will lessen.

To clarify, oxygen is a nonmetal with a little negative charge, whereas lithium is a metal with a positive charge

Explanation:

hi <3

for this conversion, you need to multiply by 10^6

thus, your answer would be 75000 mm

hope this helps :)

Answer:

protons 30

neutrons 35

electrons 30

True.

The Mass Undergoes change only in ( Solid state to liquid state ) Ice Cube to Water .

Mass changes from mg to litre.

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Answer:

If you left your aqueous sodium sulfite solution open on the side, atmospheric oxygen would cause the chemical change, the water would hydrate the new compound and the slow evaporation of water would give you lovely large crystals of Na2SO4 without you having to do anything!

Answer:

If you left your aqueous sodium sulfite solution open on the side, atmospheric oxygen would cause the chemical change, the water would hydrate the new compound and the slow evaporation of water would give you lovely large crystals of Na2SO4 without you having to do anything!

Answer:

1.Sulfur dioxide and nitrogen oxide

2.a)it forms carbonic acid

b)

3.the community can use renewable energy like solar and wind power cause they produce less pollution

Answer:

95

Explanation:

94.5 contains 3 significant figures so to round it to just two, we can just round the number to the nearest whole number. Remember that we round up if we have 5 and up then we would round down if we have 4 and below.

94.5 → 95

Best of Luck!

Answer:

milliliter

Explanation:

Answer:

B milliliter

Explanation:

Answer:

uu

Explanation:

uwu 44

The standard scientific notation is expressed as A * 10^n where:

A is an integer between 1 and 10

n is an integer

Given the value 5,453,000, expressing in standard form is expressed as:

5,453,000 = 5.453 * 10⁶ m(Note that the decimal point at the back was shifted backwards 6 times)

B) 300.8kg

In this case, the decimal point will be shifted backwards 2 times to have:

3.008 * 10² kg

C) 0.00563ng

In this case, the decimal point will be shifted to the front 3 times to have:

5.63 * 10⁻³ng

D) For 0.0120325km

In this case, the decimal point will be shifted to the front 2 times to have:

1.203 * 10⁻²km

E) For  34,800s

In this case, the decimal point will be shifted backwards 4 times to have:

3.48 * 10⁴s

F) For 332,080,000cm

In this case, the decimal point will be shifted backwards 8 times to have:

3.32 * 10⁸cm

G) For the value 0.0002385ms

In this case, the decimal point will be shifted to the front 4 times to have:

2.385 * 10⁴ms

H) For the value 0.3048mL

In this case, the decimal point will be shifted to the front 1 time to have:

3.048 * 10¹mL

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Answer:

Explanation:

As,

Law of reflection states that , angle of incidence is always equal to angle of reflection.

Answer:

use secondary data. the normal method to use

Answer:

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Explanation:

jejfihfirhugv

density = mass/volume

252/30 = 8.4 g/cm3

The metal is likely to be Nichrome

What is Density?

The Density of a material is the mass per unit volume

say the mass is m kg

and the volume is v cm^3

Then the density is

Density = mass/volume

Given data

Mass = 252g gram

volume = 30 cm^3

Hence the density can be calculated as

Density = 252/30

Density =  8.4 g/cm^3

From the value, this corresponds to the density of Brass

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Explanation:

pure substance are made up of a bulk quantity of individual atom are molecules each pure substance in made up of one of individual atom of the same type that are connected to a form extended structure molecules of different type of atoms that are not attracted to each other eh carbon dioxide

Same type of atoms are bound to form molecules, these molecules are joined to form larger pure compound.

Atoms are the smallest and basic units of  matter which has three subatomic particles such as positively charged protons, neutral Neutrons form nucleus.

A negatively charged electron which surround the nucleus of the atom.  

The nucleus does not change during chemical reactions, only in nuclear reactions it will change.

In nucleus equal number of protons and neutrons, atomic number is the number of protons and atomic mass is made of the sum of protons and neutrons.

Smaller electrons orbit the nucleus participate in chemical reactions .

A molecule is defined as two or more atoms bonded together by different bonds like ionic, covalent, electrostatic, coordinate bonds.

Examples of molecules includes carbon dioxide, water, ammonia, glucose etc.

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Answer:

electrolyte

Explanation:

Answer:

Cold

Explanation:

Cold is not matter.

Answer:

3

Explanation:

cold is not matter it is the absence of heat within matter

The oil will separate from the seawater when the the mixture is left to settle.

A mixture is a combination of two or more substances that are not chemically combined together.

The red-tinted oil and blue-tinted seawater represents a mixture since the two substances do not combine chemically.

When the oil and seawater are mixed and the mixture is agitated, the oil appears to be all mixed up with the seawater.

After a while, the oil separates from the seawater and floats on top of the seawater because oil is less dense than seawater.

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Answer:

D)driying of limonite these is the answer

Neutrons and protons are almost exactly the same size

Explanation:

(a neutron has about 1/10th of one percent more mass). ... Carbon has 6 protons, so its atomic number is 6; oxygen has 8 protons, so its atomic number is 8. Uranium has 92 protons, so its atomic number is 92!

Answer:

neutrons

Explanation:

it’s for Acellus

Answer: A) Are you asking for the production of "ions" from a solid? Or are you asking for the formation of gases. For gases, this is called "energy of vaporization."

B) "Lattice," I am guessing.

C) Greater

Explanation: Most molecules enjoy their existance as solids (not all) due to the intermolecular forces that attract the molecules to each other. These are largely hydrogen and ionic bonds. Hydrophobic compounds don't always share this enthusiam to stick together. Gasoline is happy to leave it's relatives behind and it's Up, Up, and Away.

Answer:

Once I read a NASA post where they were saying that the universe keeps expanding as matter keeps forming and cooling down thus adding to the size of the universe so keeping this in mind, the best answer choice is, option A. The universe is currently expanding and will continue to expand.

The hypothesis which is most supported by astronomers is that universe

is currently expanding and will continue to expand.

They are scientists which study  planets, stars, and other celestial bodies.

They have strong beliefs on Big bang theory.

The theory states that the Universe was formed as a result of a big bang in

which one point began to expand . This is why option A is the most

appropriate.

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Answer: A is correct. I don't see the "element shown below," but it isn't needed to answer this question.

Explanation: By definition, the atomic mass is based on the sum of protons (1 AMU each) and neutrons (1 AMU each). Electrons are assigned a value of 0 AMU.