Please help! I'd appreciate it a lot!
Please help! I'd appreciate it a lot! - 1

Answers

Answer 1
Answer:

Answer:

6 is B, 7 is A

Explanation:


Related Questions

Which formula represents a molecular compound?(1) Kr (3) N2O4(2) LiOH (4) NaI
Which polyatomic ion contains the greatest number of oxygen atoms?(1) acetate (3) hydroxide(2) carbonate (4) peroxide
How many moles are in 30 grams of H3PO4?
50 grams of acetic acid C2H4O2 are dissolved in 200 g of water. Calculate the weight % and mole fraction of the acetic acid in the solution
What is a volcano that is erupting or has erupted in the last 100 years called?A- semi-dormant volcanoB- active volcanoC- extinct volcanoD-lava filled volcano

An experiment using alpha particles to bombard a thin sheet of gold foil indicated that most of the volume of the atoms in the foil is taken up by ...

Answers

Empty space. We now know that this is the gap between the electrons and nucleus.

The experiment that used alpha particles to bombard a thin sheet of gold foil indicated that most of the volume of the atoms in the foil is taken up by \boxed{{\text{empty space}}}

Further Explanation:

Rutherford’s experiment:

Rutherford's model of atom is the classic model of the atom instead of having many limitations. He designed an experiment that used alpha particles emitted by radioactive elements as objects that can demonstrate the structure of the atom. Rutherford showed his own physical model for the subatomic structure as a result of the experimental observations.

The postulates of Rutherford’s model are as follows:

1. An atom consists of a positive charge in a very small volume. Most of its mass is concentrated in a very small region of the atom and this region was termed as the nucleus of the atom.

2. The nucleus of the atom is surrounded by the negatively charged particles which were called electron. These electrons were supposed to revolve around the atomic nucleus in a circular path at a very high speed. This circular path is called orbit.

3. A very strong electrostatic force of attraction holds together the negatively charged electrons revolving around the nucleus positively charged concentrated in the nucleus.

Limitations of Rutherford’s model:

1. It did not tell anything about the distribution of electrons in various orbits.

2. This model failed to explain Maxwell’s theory of electromagnetic radiation.

3. It was unable to explain the stability of an atom.

Therefore most of the volume of an atom is taken up by empty space in the atom.

Learn more:

1. The major contribution of Antoine Lavoisier to chemistry: brainly.com/question/2500879

2. Example of physical change: brainly.com/question/1119909

Answer details:

Grade: High School

Subject: Chemistry

Chapter: Atomic Structure

Keywords: Rutherford, atom, volume, nucleus, orbit, postulates, limitations, Maxwell, electromagnetic radiations, distribution of electrons, stability of atom.

Consider the unbalanced equation for the combustion of hexane:2C6H14(g)+19O2(g)→12CO2(g)+14H2O(g)Determine how many moles of O2 are required to react completely with 7.9 moles C6H14.

Answers

The balanced equation is C6H14(g) + 19/2O2(g) → 6CO2(g) + 7H2O(g). If you are given 7.9 moles C6H14, multiply it by a ratio of 19/2/1 to get the moles of oxygen. Then, you will get 75.05 moles of O2.

What SI unit would best be used to express the height of your classroom ceiling ?

Answers

Since height is a basic physical property of length, the height of a classroom ceiling is expressed in meters, or meters, or meters.

What is physical property of length?

There are some physical characteristics of matter, such as length, mass, volume, weight, and so forth, that are dependent on the amount or size of the substance.

As the size or amount of the matter changes, so do these qualities of matter and their values.

A quality of matter that is unrelated to a change in its chemical makeup is called a physical property.

Density, color, hardness, melting and boiling points, and electrical conductivity are a few common examples of physical qualities.

The physical characteristics include color, phase, odor, and boiling point. Reactivity with oxygen is not a physical quality because it depends on the chemical makeup of the thing.

Therefore, meter is used to express the height of your classroom ceiling.

Learn more about length here:

brainly.com/question/1319287

#SPJ2

Feet would be the best unit to use. Yards would work as well though. 
Hope that helps!

Which list of elements from Group 2 on the Periodic Table is arranged in order of increasing atomic radius?(1) Be, Mg, Ca (3) Ba, Ra, Sr
(2) Ca, Mg, Be (4) Sr, Ra, Ba

Answers

1) Be, Mg, CaBe, Mg, Ca, Sr, Ba, Rb are increasing layers
According to the periodic table, as you go down a group, atomic radius increases due to increasing number of electron shells. Therefore, your answer (1) Be, Mg, Ca.

A student dissolves some solid NaNO3 in a beaker of water. Which are the solute and the solvent? Choose all answers that are correct. A. solute: water B. solvent: water C. solvent: NaNO3 D. solute: NaNO3

Answers

The correct answer is D. The solute in this solution is the solid sodium nitrate (NaNO3) which is dissolved in the solvent, the water. Solute is the minor component in a solution whereas the solvent is the major component in the solution.

An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is(1) emitted by the nucleus
(2) emitted by the electron
(3) absorbed by the nucleus
(4) absorbed by the electron

Answers

An atom of oxygen is in an excited state. When an electron in this atom moves from the third shell to the second shell, energy is emitted by the electron. Hence, option B is correct.

What is an atom?

 The smallest piece of stuff that still retains its characteristics is an atom. A gold atom, for instance, is the smallest piece of that element that will still retain all of gold's properties and behaviors. When an atom is disassembled into its component parts, the subatomic particles found inside each have special characteristics that are not at all similar to those of the element the atom represents. Protons, neutrons, and electrons are the three different subatomic particle kinds.

The electron that transitioned from a higher to a lower level felt the change in energy level. Since the nucleus is unaffected, its energy levels are unaffected as well. Since it requires more energy to keep an electron at a higher energy level than a lower one, the shift in energy levels indicates that the electron released some energy.

To get more information about Atom :

brainly.com/question/13518322

#SPJ2

The change in energy level was experienced by the electron that moved from a higher to a lower level. This does not affect the nucleus, so the nucleus itself does not change energy levels. It takes more energy to hold an electron at a higher than a lower energy level, so the change in energy levels means that some energy was released by the electron, and this is choice (2).