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cestrela7 [59]
3 years ago
7

Isotopes of an element have the same number of ________ and different numbers of ________. neutrons... protons protons... neutro

ns electrons...protons protons...electrons
Chemistry
1 answer:
Ivahew [28]3 years ago
8 0
Protons . . . neutrons
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Core electrons shield what from the pull of the nucleus?
nikklg [1K]

Answer:

C. Valence electrons

Explanation:

Please mark my answer as brainliest, I would appreciate it.

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5 0
3 years ago
Compare and contrast the ease at which molecules are able to move relative to each other in the three states of matter
ANTONII [103]
The arrangement of molecules within the 3 phases of matter are shown in the picture. 

For the solid, the molecules are packed closely together. They don't have much space to move, so they just practically vibrate. For the liquid, the molecules are relatively farther from each other. The liquid molecules can flow freely but not as much as the gases. In the gases, the molecules are very far from each other. They are very sensitive to slight changes of pressure, volume and temperature.

5 0
3 years ago
The number of electrons in the outermost principal energy level of a chlorine atom is
Hitman42 [59]

Answer:

seven electrons

Explanation:

Chlorine is present in group seventeen of periodic table. It is halogen element. All halogens have seven electrons in outer most valance shell.

The require only one electron to gain the stable electronic configuration or to complete the octet.

Electronic configuration of chlorine:

Cl₁₇ = 1s² 2s² 2p⁶ 3s² 3p⁵

Abbreviated electronic configuration:

Cl₁₇ = [Ne] 3s² 3p⁵

Properties of chlorine:

1. it is greenish-yellow irritating gas.

2. its melting point is 172.2 K

3. its boiling point is 238.6 K

4. it is disinfectant and can kill the bacteria.

5. it is also used in manufacturing of paper, paints and textile industries.

5 0
3 years ago
Cathode rays were shown to be a stream of _____. protons electrons neutrons quarks
Murljashka [212]

It's B) electrons, is the right answer

7 0
3 years ago
Use the drop-down menus to complete each sentence.
alina1380 [7]

Answer:

protists are part of the domain eukarya

protists make up the kingdom protista

hope this helps x

6 0
3 years ago
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