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Nookie1986 [14]
3 years ago
13

What is a quick way to determine how many energy levels an element possesses?

Chemistry
1 answer:
vredina [299]3 years ago
5 0

Answer:

c

Explanation:

just got this question

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Which species acts exclusively as spectator ions in this reaction
adelina 88 [10]

Answer:

K^+ and NO3^-

Explanation:

In a balanced ionic equation, we usually see the species that react to yield the main product in the reaction.

Consider the reaction;

Pb(NO3)2(aq) +2 KI(aq) -------> PbI2(s) + 2KNO3(aq)

The main product in this reaction is PbI2. Hence the balanced ionic equation is;

Pb^2+(aq) + 2I^-(aq) ------> PbI2(s)

Notice that K^+ and NO3^- did not participate in this reaction. All ions that are part of the molecular equation but do not participate in the ionic reaction equation are called spectator ions. Hence K^+ and NO3^- are spectator ions in this reaction as can be seen clearly above.

4 0
3 years ago
Which of the following is an SI base unit for measuring length?
Nikolay [14]
An SI base unit for measuring length would be meters.
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3 years ago
How many atoms of Ga are there?
xz_007 [3.2K]
The answer is 2

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5 0
3 years ago
If an element has 10 protons and 11 neutrons and 10 electrons, which expression correctly identifies the element? Atomic numbers
Bezzdna [24]

Answer:

Explanation:

Firstly, it should be noted that atomic number (number of protons) determines element. And the element with the atomic number 10 (10 protons) is Neon. Hence, Neon-10 (₁₀Ne) is the answer.

Note that sodium has an atomic number of 11. Also, number of protons is usually equal to the number of electrons in neutral atoms, this is because the total number of positive particles (protons) must be equal to the total number of negative particles (electrons) to give a neutral atom.

4 0
3 years ago
Write sentences that completely describe each of the chemical reactions shown in these skeleton equations. 11.1
Natasha2012 [34]
Please upload a photo of your question!
6 0
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