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Lostsunrise [7]
3 years ago
15

Which of the following ions would represent the ion of an element from Group 2 on the Periodic Table? A2+ Y3+ X2- Z+

Chemistry
1 answer:
Luba_88 [7]3 years ago
7 0
A2+. Group 2 elements form cations with 2+ charge.
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Noble Gases (18): (Name all noble gases)
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Answer :

  • The Noble gasses are Helium (He), Neon (Ne), Argon (Ar), Krypton (Kr), Xenon (Xe), Radon (Rn).
  • When air is cold, Oxygen liquefies first at -182^oC. N_2 liquefies at -195^oC. About 1% of the air is still gas composed of the noble gas Argon, Ar.
  • One noble gas was discovered on the sun. It’s spectrum was identify first. This is Helium, He.
  • One of noble gas is radioactive and seeps up your basement floors and walls. It is Radon, Rn.
  • This noble gas is used in electronic flashes and other bright lights. It is Xenon, Xe.
  • This noble gas is best known for its orange color in gas discharge tubes. It is used for signs that bear its name. It is Neon, Ne.
3 0
3 years ago
The density of mercury, the only metal to exist as a liquid at room temperature, is 13.6 g/cm3. What is that density in pounds p
saw5 [17]

Answer:

0.492 lb/in^3

Explanation:

From Density of Mercury (13.6g/cm3) given,

Mass = 13.6g

Volume = 1cm3

Now we covert these variables as follows :

For Mass:

454 g = 1 lb

13.6g = 13.6/454 = 0.03lb

For volume:

2.54 cm = 1 in

1cm = 1/2.54 = 0.394in

Volume = (0.394in)^3 = 0.061 in^3

Density = Mass /volume

Density = 0.03lb/0.061 in^3

Density = 0.492 lb/in^3

6 0
3 years ago
What is the benefit of writing a net ionic equation instead of a formula equation?
brilliants [131]

Answer:

The correct option is The net ionic equation shows the spectator ions in the reaction.

Explanation:

The net ionic reaction will show us the ions which are involved in the reaction. It also helps us the charges present on each atom and how a reaction occurs due to these charges on atoms. It shows us that which ions actually take part in a chemical reaction and which ions do not take part in the reaction and are involved only for balancing the equation.

4 0
3 years ago
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Which of the following is a homogeneous mixture
Citrus2011 [14]

Answer:

Explanation:

A homogenous mixture is a mixture is the same throughout. Some examples are clean water, milk, oil, and food colouring.

8 0
3 years ago
Atoms in a molecule stick together due to
Nonamiya [84]
Atoms “stick” to each other because they all try to get into a noble gas configuration. Which simply means that they try to reach a amount of electrons equal to noble gasses, this property makes simple atoms like water stable. I hope this helps! Have a great day and stay safe!
7 0
3 years ago
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