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3 years ago

Atoms of the element beryllium would most likely behave similar to the way _______ behaves.

2 answers:

3 0

It's b. calcium
because the outer electron structure in all of that element is similar, they have the same chemical and physical properties.

tatiyna3 years ago

3 0

Answer: The correct answer is Option B.

Explanation:

Beryllium is the 4th element of the periodic table having electronic configuration $1s^22s^2$ . This element belongs to Group 2 of the periodic table.

Elements that belong to same group show similar chemical properties because they have same number of valence electrons.

For the given options:

Option A: Hydrogen

This element belong to group 1 of the periodic table.

Option B: Calcium

This element belong to group 2 of the periodic table. Thus, this will show similar chemical properties to beryllium.

Option C: Lithium

This element belong to group 1 of the periodic table.

Option D: Boron

This element belong to group 13 of the periodic table.

Hence, the correct answer is Option B.

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Which of the following would increase friction?

KiRa [710]

B. Sand.

Sand would definitely increase friction because of the roughness of it surface. When its surface comes with another rough surface it would tend to increase friction. All other options given tend to reduce friction one way or the other.

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3 years ago

The radius of an indium atom is 0.163 nm. If indium crystallizes in a face-centered unit cell, what is the length of an edge of

adoni [48]

Answer: The edge length of the unit cell is 0.461 nm

Explanation:

We are given:

Atomic radius of iridium = 0.163 nm

To calculate the edge length, we use the relation between the radius and edge length for FCC lattice:

$a=2\sqrt{2}R$

Putting values in above equation, we get:

$a=2\sqrt{2}\times 0.163=0.461nm$

Hence, the edge length of the unit cell is 0.461 nm

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3 years ago

The Second Law of Thermodynamics states that: Select one:

lianna [129]

Answer:

In the total entropy of an isolated system, the thermal energy per unit temperature that is unavailable for doing useful work can never decrease.

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2 years ago

Edmentum

goldenfox [79]

Answer:

They all contain switches

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2 years ago

300×175 Express your answer using the correct number of significant figures.

icang [17]

Answer:

300×175=52500

Explanation:

caculator

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3 years ago