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White raven [17]
3 years ago
7

36. Write the SHORTCUT electron configuration for Caesium (Cs) which is element #55.

Chemistry
1 answer:
miv72 [106K]3 years ago
6 0

Answer:

Cesium. Full electron configuration of cesium: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 6s1. xenon ← cesium → barium

Explanation:

most include 36. :-]

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What is the decay mode of radium-226?
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Answer:

Radium-226 is a radioactive decay product in the uranium-238 decay series and is the precursor of radon-222. Radium-228 is a radioactive decay product in the thorium-232 decay series. Both isotopes give rise to many additional short-lived radionuclides, resulting in a wide spectrum of alpha, beta and gamma radiations.

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3 years ago
What is the electron configuration of an element with atomic number 15?
Ghella [55]
1s to the second power, 2s to the second power, 2p to the 6th power, 3s to the second power and 3p to the third power.
4 0
3 years ago
10. In which of the following is the symbol for the ion and the total number of electrons it contains given correctly?
dalvyx [7]

Answer:

10. D

9. A

8. A or B

Explanation:

10. Calcium has 20 electrons, but the Calcium ion has 18 electrons.

9. The mass of electrons are negligible.

8. Electrons have a very small mass where some consider it to have no mass.

5 0
3 years ago
How to revise in just 1 whole day for chemistry combined science is it possible to get a good grade
Pavlova-9 [17]

it will be hard, but you can do it. Just study given the materials for the course. Understand enthalpy and entropy, and various types of bonding and you'll be fine.

4 0
3 years ago
Acetylene gas is often used in welding torches because of the very high heat produced when it reacts with oxygen gas, producing
rodikova [14]

Answer:

0.225 mol = 0.23 mol to 2 significant figures

Explanation:

Calculate the moles of oxygen needed to produce 0.090 mol of water

The equation of the reaction is given as;

2 C2H2 + 5 O2 --> 4 CO2 + 2 H2O

From the equation of the reaction;

5 mol of O2 produces 2 mol of H2O

x mol of O2 produces 0.090 mol of H2O

5 = 2

x = 0.090

x = 0.090 * 5 / 2

x = 0.225 mol

8 0
2 years ago
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