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Svetlanka [38]
3 years ago
5

4. Which of the following statements accurately compares the wavelengths of the waves shown below?

Chemistry
1 answer:
wlad13 [49]3 years ago
5 0

Answer:

B. wave 1 has a larger wavelength than wave 2

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The melting points of alkaline earth metals are many times higher than those of the alkali metals. Explain this difference on th
7nadin3 [17]

The correct answer is higher melting point, bound by metal metal bonds.

While alkali metals only have one valence electron, alkaline earth metals have two. Metal to metal connections hold the metals together. Alkaline earth metals have a stronger metallic connection and a higher melting point because they have two valence electrons.

the characteristics that Group 2 metals excel in over Group 1 metals.

  • Initial Ionization Potential
  • Group 2 items are more difficult than group 1 elements.
  • Strong propensity to produce bivalent compounds

As a result, group 2 metals have stronger metallic bonding, which leads to increased cohesive energy and compact atom packing. This explains why group 2 metals are harder and have higher melting and boiling temperatures than group 1 metals.

To learn more about  Group 2A(2) refer the link:

brainly.com/question/9431096

#SPJ4

3 0
2 years ago
Your mommy buys you a helium balloon at the circus. It has a volume of 2.95 liters. What is the mass
GrogVix [38]

Answer:

if my calculation are correct, it's 295 grams

Explanation:

because liters converted to grams is .1=100 so if you take 2.95 times 100, it equals 295

4 0
2 years ago
Two protons and two neutrons are released as a result of this reaction.
Murljashka [212]

<u>Answer:</u> The particle released in the given reaction is one alpha particle

<u>Explanation:</u>

In a nuclear reaction, the total mass and total atomic number remains the same.

For the given fission reaction:

^{222}_{86}\textrm{Rn}\rightarrow ^A_Z\textrm{X}+^{218}_{84}\textrm{Po}

  • <u>To calculate A:</u>

Total mass on reactant side = total mass on product side

222 = A + 218

A = 4

  • <u>To calculate Z:</u>

Total atomic number on reactant side = total atomic number on product side

86 = Z + 84

Z = 2

The isotopic symbol of unknown element is _{2}^{4}\textrm{He}. Another name of helium atom is alpha particle.

Hence, the particle released in the given reaction is one alpha particle

3 0
3 years ago
Read 2 more answers
In the lab, you looked at speed-time graphs to determine the acceleration of the cart for each of the three fan speeds
Bumek [7]

Answer:

What was the acceleration of the cart with Low fan speed?  ⇒ 18.0 cm/s2

What was the acceleration of the cart with Medium fan speed?  ⇒ 24.0 cm/s2

What was the acceleration of the cart with High fan speed? 32.0cm/s2

Explanation:

8 0
3 years ago
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How many joules are needed to melt 50 g of ice at 0°C?
Alexeev081 [22]

Answer:

You need the Delta H fusion for water. Multiply that by 50 grams. Then multiply 50 g x 4.184 x 65 to get joules to raise water to 65 degrees. Add these values together to get total joules.

Explanation:

6 0
3 years ago
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