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den301095 [7]
4 years ago
8

Based on its location on the periodic table, which element would be most

Physics
2 answers:
mario62 [17]4 years ago
8 0

Answer: Sodium Na

Hydrogen H

sergejj [24]4 years ago
7 0

The question is incomplete, here is the complete question:

Based on its location on the periodic table, which element would be most likely to form a positive ion?

A. Sulfur (S)

B. Chlorine (Cl)

C. Sodium (Na)

D. Fluorine (F)

<u>Answer:</u> The element which is most likely to form positive ion is Sodium (Na)

<u>Explanation:</u>

An ion is formed when a neutral atom looses or gains electrons

When an atom looses electrons, it results in the formation of positive ion known as cation.

When an atom gains electrons, it results in the formation of negative ion known as anion.

For the given options:

  • <u>Option A:</u> Sulfur

Sulfur is the 16th element of the periodic table having electronic configuration of 1s^22s^22p^63s^23p^4

This element will gain 2 electrons to attain stable electronic configuration and will form S^{2-} ion

  • <u>Option B:</u> Chlorine

Chlorine is the 17th element of the periodic table having electronic configuration of 1s^22s^22p^63s^23p^5

This element will gain 1 electron to attain stable electronic configuration and will form Cl^{-} ion

  • <u>Option C:</u> Sodium

Sodium is the 11th element of the periodic table having electronic configuration of 1s^22s^22p^63s^1

This element will loose 1 electron to attain stable electronic configuration and will form Na^{+} ion

  • <u>Option D:</u> Fluorine

Fluorine is the 9th element of the periodic table having electronic configuration of 1s^22s^22p^5

This element will gain 1 electron to attain stable electronic configuration and will form F^{-} ion

Hence, the element which is most likely to form positive ion is Sodium (Na)

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which part of the microscope will be used first to adjust the focus when starting with the lowest power lens?
noname [10]

The first part of the microscope that should first be used to adjust the focus when starting with the lowest power lens would be the coarse adjustment knob.

There are two knobs in a typical light microscope with which objects on slides can be brought into focus:

  1. Coarse adjustment knob
  2. Fine adjustment knob

The 2 knobs are used to adjust the stage to either bring it up towards the objective lens or down away from them. The coarse adjustment knob, however, moves the stage a considerable distance with each turn. The fine adjustment knob, on the other hand, only moves the stage very little with each turn.

The lowest power lenses are often short. Hence, using the coarse adjustment knob is ideal in order to quickly bring objects on slides into focus.

The fine adjustment knob comes highly recommended at high objectives because high objectives lenses are usually long and using the coarse adjustment knob can lead to a breakage of the slide by the lens.

More on bringing objects into focus on a microscope can be found here: brainly.com/question/24319677

7 0
3 years ago
What is 78,900,000,000 written in scientific notation?
kogti [31]

Answer:

7.89x10¹°

Explanation:

10 to the power of 10

Sorry i dont understand how to type it

4 0
3 years ago
Read 2 more answers
What is the relative humidity if the dry-bulb temperature is 18°C and the wet-bulb temperature is 11°C?
Diano4ka-milaya [45]

Answer:

The amount of moisture air can hold is dependent on its temperature and pressure. The warmer the air the greater the quantity of water vapour it can contain. The air temperature is measured with a normal thermometer this is the Dry-Bulb reading. The actual amount of moisture known as the mixing ratio is measured in grams of water per kilogram of dry air. When air at a certain temperature is saturated it cannot hold any more moisture. The relative humidity of the air is the ratio of the actual amount of moisture in the air to the fully saturated amount.

We can use evaporation to measure the amount of moisture in the air. A wet cloth is placed over the bulb of a thermometer and then air is blown over the cloth causing the water to evaporate. Since evaporation takes up heat, the thermometer will cool to a lower temperature than a thermometer with a dry bulb at the same time and place. The depression in Wet-Bulb temperature allows the humidity to be calculated. If the air is fully saturated (100% relative humidity) the water cannot evaporate, so both the wet and dry bulb temperatures are the same. If the dry and wet bulb temperatures are set to the same value the calculator will show the saturation mixing ratio the amount of water in saturated air at that temperature.

If partly saturated air is cooled without changing its pressure or amount of water vapour, a point is reached when it becomes saturated. The moisture will be given up as dew or ice crystals. This temperature is the Dew Point. This is why condensation will form on a bottle of cold beer, as the air in the vicinity of the bottle is cooled below its dew point. Meteorological reports usually quote the temperature and dew point as well as the station pressure. Moisture content and relative humidity can be calculated from these figures.

The Psychrometer is the name of a device containing both a wet and dry bulb thermometer. This can be a fixed device for meteorology or a handheld sling psychrometer that is often used in air conditioning applications.

Explanation:

7 0
4 years ago
A projectile is fired at an angle such that the vertical component of its velocity
mestny [16]

Answer:

<em>It takes 3 seconds to reach its high point</em>

Explanation:

<u>Projectile Motion</u>

In a projectile motion (or 2D motion), the object is launched with an initial angle θ and an initial velocity vo.

The components of the velocity are

v_{ox}=v_o\cos\theta

v_{oy}=v_o\sin\theta

The speed in the horizontal direction at any time t is:

v_y=v_o\sin\theta-g.t

The time taken to reach the maximum height is when vy=0, or:

\displaystyle t_m=\frac{v_o\sin\theta}{g}

We are given the y-component of the velocity, thus:

\displaystyle t_m=\frac{30~m/s}{10~m/s^2}

t_m=3~s

It takes 3 seconds to reach its high point

3 0
3 years ago
Which of the following is not accurate when describing solids?
yuradex [85]
The correct answer is:  [D]:
__________________________________________________________
"The amount of pressure exerted by a solid is solely dependent on its mass."
__________________________________________________________
5 0
3 years ago
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