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4 years ago

Which statement about subatomic particles is true?

2 answers:

7 0

The correct option is this: ELECTRONS ARE THE SUB ATOMIC PARTICLES WITH THE SMALLEST MASS.
The atom is made up of three sub particels, which are protons, neutrons and electrons. Both proton and neutrons have the atomic mass of 1 unit while the mass of the electron is 0.0005.

irina [24]4 years ago

4 0

The correct answer is B) Electrons are the subatomic particles with the smallest mass.

Neutrons and protons weigh roughly the same, and comprise the vast majority of the atomic mass of an atom. The electron is several orders of magnitude less massive than the neutron and proton, and has almost not effect on the mass of the atom.

Why the other answers are wrong:
Subatomic particles all have the same mass - see paragraph above
Neutrons orbit the nucleus of the atom: Neutrons are found in the nucleus, along with protons, but they do not orbit it.
Protons are the only particles with charge. Electrons have a charge as well.

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In the periodic table hydrogen is placed in Group 1A (group 1) and helium is placed in Group 8A (group 18). The most likely reas

Alexus [3.1K]

Answer:

This question appears incomplete

Explanation:

This question appears incomplete because of the absence of options. However, hydrogen is placed in group 1 because it has just one electron in it's outermost shell (which happens to be the only shell it has) just like every other group 1A/group 1 element. While helium is placed in group 8A/group 18 because it has a completely filled outermost shell (which is also the only shell it has) just like every other element in group 8A/group 18.

8 0

3 years ago

Which nonmetals have similar chemical properties? Check all that apply.

alisha [4.7K]

Answer:

Sulfur

Selenium

Oxygen

Explanation:

You’re welcome:)

7 0

3 years ago

Read 2 more answers

What does the picture depict about ecology?

mezya [45]

There is no picture

5 0

3 years ago

An Element X has been discovered. Element X forms an Xt ion and

DanielleElmas [232]

<u>Answer:</u> The chemical symbol of the compound formed is $XCl$ or $NaCl$

<u>Explanation:</u>

An ionic compound is formed when the complete transfer of electrons takes place from one element (usually metals) to another element (usually non-metals).

The element losing electron (metal) forms a positive ion known as a cation while the element gaining electron (non-metal) forms a negative ion known as an anion.

Element X has the atomic number 11 which is sodium. The electronic configuration of it is $1s^22s^22p^63s^1$

This element will lose 1 electron to form $X^+$ ion of $Na^+$

Chlorine has the atomic number 17. The electronic configuration of it is $1s^22s^22p^63s^23p^5$

This element will gain 1 electron to form $Cl^-$ ion

When these two ions combine, they lead to the formation of an ionic compound having a chemical formula of $XCl$ or $NaCl$

Hence, the chemical symbol of the compound formed is $XCl$ or $NaCl$

5 0

3 years ago

The first molecule the student constructs is that for water. An image of the model is shown.

Licemer1 [7]

C) bent

Reminders:

•Linear would mean that it is completely straight

•Trigonal planar would mean that there’s 3 bonds attached to the centre atom (in this case it’s oxygen)

•Tetrahedral would mean that there’s 4 bonds attached to the centre atom

4 0

3 years ago