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pychu [463]
3 years ago
11

What are periodic trends and why are they important​

Chemistry
1 answer:
algol133 years ago
4 0

Periodic trends , arising due to the arrangement of the different elements in a periodic table. It includes electronegativity, ionization energy,electron affinity, atomic radius, metallic character and chemical reactivity.

With the help of the periodic trends,we can predict or determine an element's properties.

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Example of gases collected through upward delivery​
fgiga [73]

Answer:

In this process The more dense gases are collected in a gas jar. Carbon dioxide, Nitrogen dioxide are collected by this way. Air is displaced upward thus, this process is known as upward delivery

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4 0
3 years ago
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Someone please help! this is the last question<br>I only need help with B.<br><br>​
ludmilkaskok [199]

1. mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3

2. Na₂CO₃ as a limiting reactant

<h3>Further explanation</h3>

Given

Reaction

2 Al(NO₃)₃ + 3 Na₂CO₃ → Al₂(CO₃)₃ + 6 NaNO₃

Required

mol ratio

Limiting reactant

Solution

The reaction coefficient in the chemical equation shows the mole ratio of the components of the compound involved in the reaction (reactants and products)

1. From the equation mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3

2. mol : coefficient of Al(NO₃)₃ : Na₂CO₃ = 2 mole/2 : 2 mole/3 = 1 : 0.67

Na₂CO₃ as a limiting reactant (smaller)

6 0
3 years ago
Which is the only kind of orbital in the first energy level?
ch4aika [34]

Answer:

C. An 1s orbital

Explanation:

At the first energy level, the only orbital available to electrons is the 1s orbital, but at the second level, as well as a 2s orbital, there are also orbitals called 2p orbitals.

7 0
3 years ago
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Andrea and the other members of the tennis team are practicing hitting tennis balls. If two people hit identical balls at the sa
almond37 [142]

Answer:

D

Explanation:

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Explanation:

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