can someone help me pls​

Answer:

The number of energy levels will increase.

Explanation:

As they are all Noble Gases, they are all in the same family. However, as you go further down the list of Noble Gases, the period number increases. The period number shows the number of energy levels. Hence, an increase in energy levels.

The size of the atoms (atomic radius) would increase down the group from neon to argon to krypton.

Atomic radius can be defined as a measure of the size (distance) of the atom of a chemical element, typically from the nucleus to its valence electrons.

Generally, the atomic radius of a chemical element decreases across the periodic table, from alkali metals (group 1 elements) to noble gases (group 8 elements). Also, the atomic radius of a chemical element increases down each group of the periodic table, typically from top to bottom (column).

In this context, the size of the atoms (atomic radius) would increase down the group from neon to argon to krypton.

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Answer:

Imagine you have 5 marbles in your hand and 5 marbles spread in front of you on the floor. Each group has the same mass, but one is contained in a smaller space. The marbles in your hand would be denser because there is more "stuff" in a smaller space.

Explanation:

Answer:

O are in 535 g of N2O

Explanation:

[tex]\\ \sf\longmapsto Acceleration=\dfrac{v-u}{t}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{6-20}{6}[/tex]

[tex]\\ \sf\longmapsto Acceleration=\dfrac{-14}{6}[/tex]

[tex]\\ \sf\longmapsto Acceleration=-2.3m/s^2[/tex]

Answer:

Foam is not a state of matter, it is a mixture of two states: gas and (usually) liquid. There are also gas-solid foams.Explanation:

Answer:

Foam is not a state of matter, it is a mixture of two states: gas and (usually) liquid.

Explanation:

Answer:

a. HCl + KOH

b. HCHO₂ + LiOH

Only the first H in HCHO₂ is acidic

c. N₂H₄ + HCl

Both N atoms in N₂H₄ are basic, so the compound reacts with 2 mol of HCl.

Explanation:

Answer:

A. The metal and point

Explanation:

Elements that can conduct electric current are generally metals. However, the nonmetal carbon in the form of graphite is a good conductor of electricity.

Answer: See Explanation

Explanation:

Cytokinesis occurs in mitosis and meiosis for both plant and animal cells. The ultimate objective is to divide the parent cell into daughter cells.

In plants , this occurs when a cell wall forms in between the daughter cells.

In animals , this occurs when a cleavage furrow forms. This pinches the cell in half.

they are caused by winds and changes in seawater density.

The history of the atom passed through a certain sequence until our recent interpretation of atomic theory.

The correct sequence of atomic theory is;

The beginning of the atomic theory saw the discovery of J.J Thompson which led to the plum - pudding model in which the atom was described as a sphere in which electrons are stuck in an overall  positive atom.

This was followed by Rutherford's planetary model in which he concluded that the atom has a small dense positive  nucleus. This was followed by the model of Bohr in which the electrons exist in perfect orbits based on  energy levels.

Lastly, the contemporary model of the atom is called the wave - mechanical model in which electrons exist in orbitals, or the most  probable location.

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Answer:

since the modern periodic table is made in ascending order by the atomic number fluorine has the most protons.

The highlighted element that has the greatest number of protons is Iron, Fe. Thus, the correct option for this question is B.

Protons may be defined as a type of subatomic particles which are generally present in the centermost part of an atom known as the nucleus along with neutrons. These subatomic particles are positively charged in nature. Ernest Rutherford was known to discover these particles.

According to the question, the number of protons is generally governed by an atomic number of a chemical element. For example, fluorine has an atomic number of 9. It has the same number of protons in its nucleus. The number of protons in Iron is 26, while the number of protons in Calcium is 20. And the number of protons in aluminum is 13.

Therefore, an iron is the highlighted element that has the greatest number of protons. Thus, the correct option for this question is B.

To learn more about Protons and atomic numbers, refer to the link:

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#SPJ2

Answer:

fossils of plants and animals

distinctive rock layers and mountain ranges

Glacial scratches on rocks

Explanation: I took the quiz lol

Because White sugar settles at the bottom of iodized salt. White sugar completely mixed with iodized salt.

The best way to determine the concentration of AgNO3 dissolved in solution is by precipitation using a chloride.

Precipitation is one of the oldest and handy methods of chemical analysis. It involves the addition of a reagent which is known to form a precipitate with the test solution.

The precipitate is now recovered from solution, dried and weighed. Stoichiometric calculations show the amount of the test substance dissolved in the test solution.

In this case, NaCl can be used to carry out a precipitation as follows;

AgNO3(aq) + NaCl(aq) -------> AgCl(s) + NaNO3(aq)

The AgCl precipitate is recovered dried and weighed and then the amount of AgNO3 in the dissolved solution is determined.

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Answer:

I think it's A

Explanation:

Carbon dioxide is added to the atmosphere whenever people burn fossil fuels. ... As the amount of carbon dioxide in the atmosphere rises, the oceans absorb a lot of it. In the ocean, carbon dioxide reacts with seawater to form carbonic acid. This causes the acidity of seawater to increase.

Answer:

Rabeprazole belongs to a class of drugs known as proton pump inhibitors (PPIs).

Answer:

your creating a animal/creature

Explanation:

a human is a mammal we grow use energy reproduce and change our clothes to respond to our surroundings

For the reaction

3 Ni2+(aq) + 2 Cr(OH)3(s) + 10 OH- (aq)  →  3 Ni(s) + 2 CrO42-(aq) + 8 H2O(l) G = +87 kJ/mol

Given:

(Ni2+(aq) + 2 e- →  Ni(s)) x 3 Ered = -0.28 V

(CrO42-(aq) + 4 H2O(l) + 3 e- →  Cr(OH)3(s) + 5 OH-(aq)) x 2

_____________________________________________________________________________________

3 Ni2+(aq) + 6 e- →  3 Ni(s)

2 CrO42-(aq) + 8 H2O(l) + 6 e- →  2 Cr(OH)3(s) + 10 OH-(aq)

Answer:

Because you could die or get seriously burn bad

Answer:

Radiation protection aims to reduce unnecessary radiation exposure with a goal to minimize the harmful effects of ionizing radiation. ... As radiation exposure becomes more prevalent, a thorough understanding of radiation exposure risks and dose reduction techniques will be of utmost importance.

Explanation:

Answer:

1. Option C

2. Option D

3. Option B

4. Option

5. Option

6. Option

7. Option

Answer:

D

Explanation:

No company is allowed to discriminate.

Answer:

p stands for protons. You can identify the element by matching the atomic number with the number of protons.

The answer is Potassium in this case.

Answer:

1.8 mol

Explanation:

concentration (M) = no. of moles (mol) ÷ volume (dm³)

no. of moles = concentration ×  volume

                     = 6 × 300 / 1000

                      =  1.8 mol

Answer:

nBACO3=m/M=9,83/197=0,05(mol)  ->nHCl=0,05.2/1=0,1(mol) =>VHCl=n/CM=0,1/0,44=0,227(lít)

Explanation:

Answer:

C

Explanation: