All categories

3 years ago

Which two elements have similar characteristics- calcium hydrogen barium silicon krypton

Physics

1 answer:

Yakvenalex [24]3 years ago

8 0

Answer:

Calcium and barium

Explanation:

Krypton is a noble gas it do not take part in any reaction its physical and chemical property does not resembles to other atoms.

Hydrogen is the reducing gas its physical and chemical property does not resembles to other atoms.

Silicon is a semiconductor its physical and chemical property does not resembles to other atoms.

Calcium and Barium are placed in the same group 2 in the periodic table . Both are alkaline earth metal.

As both element are placed in the same group they have same physical and chemical properties.

Example:

Electro-negativity of Calcium and barium are approximately same.

Both have same oxidation states +2, both are strong basic oxide.

Both are present in nature in solid state.

Both are s- block element.

Thus, we can say Barium and Calcium have similar properties.

You might be interested in

Expain how a hurricane develops

Firlakuza [10]

Answer:

A hurricane starts to form when warm air rises and then that warm air turns into cooler air. After a while of this happening large clouds and thunderstorms are made. The clouds and thunderstorms keep growing and rotating from earth's Coriolis Effect. Then a hurricane forms.

6 0

2 years ago

A man attempts to pick up his suitcase of weight ws by pulling straight up on the handle. (See Figure 1) However, he is unable t

cupoosta [38]

Answer:

Normal force, $N = W_s - F$

Explanation:

Let $w_s$ is the weight of suitcase. A man attempts to pick up his suitcase by pulling straight up on the handle. The weight of the suitcase in downward direction. The normal force is acting in upward direction. Let F is the force with which it is pulled straight up.

So, the normal force is given by :

$N = W_s - F$

N = mg - F

mg is the weight of the suitcase.

Hence, this is the required solution.

3 0

3 years ago

Question 2 (Multiple Choice Worth 3 points)

zmey [24]

Surveys are considered the most reliable way to gather data

7 0

3 years ago

Unpolarized light with intensity 300 W/m^2 passes first through a polarizing filter with its axis vertical, then through a secon

SOVA2 [1]

Answer:

The angle from vertical of the axis of the second polarizing filter is 50.57⁰.

Explanation:

Given;

intensity of the unpolarized light, I₀ = 300 W/m²

intensity of emergent polarized light, I = 121 W/m²

let the angle from vertical of the axis of the second polarizing filter = θ

Apply Malus's law, intensity of emergent polarized light is given as;

I = I₀Cos²θ

$Cos^2 \theta = \frac{I}{I_o} \\\\Cos^2 \theta =\frac{121}{300} \\\\Cos^2 \theta =0.4033\\\\Cos \theta = \sqrt{0.4033} \\\\Cos \theta = 0.6351\\\\\theta = Cos^{-1} (0.6351)\\\\\theta = 50.57 ^0$

Therefore, the angle from vertical of the axis of the second polarizing filter is 50.57⁰.

8 0

2 years ago

3 examples of newtrons 2 law

frozen [14]

Explanation:

1) Kicking a ball.

2) Capture the ball by hand.

3) Push a car.

7 0

2 years ago