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Alik [6]
3 years ago
7

PLEASE HELP! an element with 8 protons and 10 neutrons

Chemistry
1 answer:
leva [86]3 years ago
6 0

Answer:

oxygen ion O2-

Explanation:

because it has 8 protons and gave gained 2 electron so O2-.

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MATCH UPS - PLEASE HELP ^^photo attachment
Charra [1.4K]

Answer:

14. c

15. e

16. b

17. d

18. a

Explanation:

5 0
3 years ago
What does percent composition tell you about a molecule
geniusboy [140]

Percent composition of a molecule is found through the molecular formula (Mass of each element found in a single mole of the molecule ÷ total molar mass of the molecule). This tells you how much of a specific element makes up the molecule.

Also be aware that 2 molecules can have the same % composition but different formulas.

5 0
3 years ago
Read 2 more answers
The following combinations are not allowed. If n and ml are correct, change the l value to create an allowable combination:
Lera25 [3.4K]

The allowable combination for the atomic orbital is n=4, l=2, m_{l}=2.

<h3>What are the three quantum numbers of an atomic orbital?</h3>

Three quantum numbers specify an atomic orbital:

- The principal quantum number, n, which is a positive integer, describes the relative size of the orbital and its distance from the nucleus.

- l is the angular momentum quantum number that is related to the shape of the orbital; l is an integer from 0 to n-1 (so n limits l ),

- $\boldsymbol{m}_{l}$ is the magnetic quantum number that prescribes the three-dimensional shape of the orbital around the nucleus; m_{l} values are integers from -l to =l(l limits ml)

For n = 4, l can four values: 0, 1, 2, and 3. To be consistent with m_{l}=+2the l value must be higher than 1. There are two l values that are consistent with n and m_{l} values:  l= 2 or 3

Therefore, the allowable condition is n=4, l=2, m_{l}=2

To know more about quantum numbers, visit: brainly.com/question/16979660

#SPJ4

3 0
2 years ago
Use Table 1: Analysis of Decay in the laboratory guide to answer this question: Scientists find a piece of wood that is thought
sashaice [31]
1/2=5750 years, 1/2(1/2)=1/4, (1/2)(1/2)(1/2)=1/8, (1/2)(1/2)(1/2)(1/2)=1/6
4 halflives have passed so 4(5750)=23000 years since the tree was chopped down
1000000 atoms (1/2)=500000 atoms(1/2)=250000(1/2)=125000(1/2)=62500 atoms would remain in the wood after 4 halflives
Dinosaurs became extinct around 62 million years ago, so if 14C's half life has a value of 5750 years, it would be gone or in such small amounts that dating would be ineffective today.
As Potassium decays into Argon in 1.3 billion years, apart from volcanic activity, it would enable geologists to effectively date things that are really, really, really old. 
8 0
3 years ago
What is a Chemical Properties and Physical Properties? Please tell me the deffinition of them both.
Pavlova-9 [17]

Answer:

All properties of matter are either physical or chemical properties and physical properties are either intensive or extensive. ... Physical properties can be measured without changing a substance's chemical identity. Chemical properties can be measured only by changing a substance's chemical identity.

Explanation:

3 0
2 years ago
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