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3 years ago

In the periodic table of elements, what do all of the elements in group 2 have in common?

Physics

2 answers:

Ira Lisetskai [31]3 years ago

8 0

Answer: Option (C) is the correct answer.

Explanation:

Elements of group 2 are also known as alkaline earth metals. Elements of this group are beryllium, magnesium, calcium, strontium, barium and radium.

Since, all of them belong group 2 so, they have 2 valence electrons in their outer most shell.

Also, being metals all of them except radium which is radioactive in nature are metals. They are good conductors of heat and electricity, they have shiny surface and they are also malleable and ductile in nature.

Hence, we can conclude that out of the given options in the periodic table of elements, all of the elements in group 2 have in common that each element is an alkaline earth metal.

Shkiper50 [21]3 years ago

6 0

The correct answer is letter C.

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If you drive at 100 km/hr for six hours how far will you go

zhuklara [117]

600km/h

100 times 6 = 600

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3 years ago

A block of mass 27.00 kg sits on a horizontal surface with, coefficient of kinetic

zhannawk [14.2K]

Answer:

The force is $F = 172 \ N$

Explanation:

From the question we are told that

The mass of the block is $m_b = 27.0 \ kg$

The coefficient of static friction is $\mu_s = 0.65$

The coefficient of kinetic friction is $\mu_k = 0.50$

The normal force acting on the block is

$N = m * g$

substituting values

$N = 27 * 9.8$

$N = 294.6 \ N$

Given that the force we are to find is the force required to get the block to start moving then the force acting against this force is the static frictional force which is mathematically evaluated as

$F_f = \mu_s * N$

substituting values

$F_f = 0.65 * 264.6$

$F_f = 172 \ N$

Now for this block to move the force require is equal to $F_f$ i.e

$F= F_f$

=> $F = 172 \ N$

5 0

3 years ago

A crate is being lifted into a truck. If it is moved with a 2470 N force and 4850 J of work is done, then how far is the crate b

olchik [2.2K]

Answer:1.96m

Explanation:

Work=4850J

Force=2470N

Distance =work ➗ force

Distance =4850 ➗ 2470

Distance =1.96m

7 0

3 years ago

Consider four atoms from the second period: lithium, beryllium, boron, carbon, and nitrogen. Which of these emblems has the lowe

xz_007 [3.2K]

If you go to the right along the periodic table, electronegativity increases.
So the larger the column number, the greater the electronegativity.

-Lithium has lowest as it is in the 1st column

-Beryllium (2nd column)
-Boron s (13th column)
-Nitrogen (15th column)

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3 years ago

sladkih [1.3K]

Answer:

mass and distance

Explanation:

force is mass while motion can also be regard as distance or movement

3 0

3 years ago