Which electrons are represented by all of the dots?

Answers

Answer 1

Answer: Simple. In the Lewis Dot Structure, the outer core electrons represent them all.Remember this: 8 is the max.

Answer 2

Answer:

Final answer:

All of the dots in a Lewis symbol represent the valence electrons of an atom. Valence electrons are responsible for the atom's chemical properties and can be determined by the group number of the element on the periodic table.

Explanation:

All of the dots in a Lewis symbol represent the valence electrons of an atom. Valence electrons are the electrons in the outermost energy level of an atom and are responsible for the atom's chemical properties. The number of valence electrons can be determined by looking at the group number (also known as the column number) of the element on the periodic table.

For example, oxygen (O) is in group 16, so it has six valence electrons. Its Lewis symbol would have six dots surrounding the elemental symbol.

Similarly, chlorine (Cl) is in group 17, so it has seven valence electrons. Its Lewis symbol would have seven dots surrounding the elemental symbol.

Learn more about Valence electrons here:

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H2SO3
Spell out the full name of the compound.

Answers

sulfurous acid or sulphurous acid

The full name of this compound/ acid is:
Sulfurous acid or Sulphorous acid

... Remember SO3 is a ployatomic ion ending in -ite..
.... I hope it helps!

Which statement describes J.J. Thomson’s plum-pudding model of the atom?A. The electrons take up most of the space in an atom.
B. The electrons in the atom orbit around the protons.
C. The electrons are embedded in a positive sphere.

Answers

Option C: the electrons are embedded in a positive sphere.

As we know that was a wrong model and nowadays the electrons are considered to be around the nucleus, in regions called orbitals.

A substance that contains only one kind of matter is known as a(n)A. atom.
B. element.
C. molecule.
D. compound.

Answers

Answer: B. element.

Explanation:

An atom is the smallest unit of any matter which may or may not have independent existence.

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Copper $(Cu)$

Molecule is the smallest unit of any matter which always have independent existence.

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.It can be decomposed into simpler constituents using chemical reactions. Example: water $CO_2$

Elements are composed of only one type of atom, so element is the term you need

Which type of bond is present in hydrogen sulfide (H2S)? The table of electronegativities is given.

Answers

nonpolar covalent bond (with LD force)

49 After decaying for 48 hours, l/16 of the original mass of a radioisotope sample remains unchanged. What is the half-life of this radioisotope?(1) 3.0 h (3) 12 h(2) 9.6 h (4) 24 h

Answers

Answer:

The half life of the radioisotope is 12 hours.

Explanation:

Initial mass of the radioisotope = x

Final mass of the radioisotope = $(1)/(16)* x$ = 0.0625x

Half life of the radioisotope = $t_{(1)/(2)}$

Age of the radioisotope = t = 48 hours

Formula used :

$N=N_o* e^(-\lambda t)\n\n\lambda =\frac{0.693}{t_{(1)/(2)}}$

where,

$N_o$ = initial mass of isotope

N = mass of the parent isotope left after the time, (t)

$t_{(1)/(2)}$ = half life of the isotope

$\lambda$ = rate constant

$N=N_o* e^{-((0.693)/(t_(1/2)))* t}$

Now put all the given values in this formula, we get

$0.0625x=x* e^{-((0.693)/(t_(1/2)))* 48 h}$

$\ln(0.0625) * (1)/((-0.693* 48 h))=(1)/(t_(1/2))$

$t_(1/2) = 11.99 hours = 12 hours$

The half life of the radioisotope is 12 hours.

1/16 left would imply 4 half lives have passed (1/2 left = 1, 1/4 left = 2, 1/8 left = 3, 1/16 left = 4). So 4 half lives passed in 48 hours, meaning dividing 48 by 4 will give you the length of 1 half life. Which in this case is 12 hours.

What are the variables of Boyle's law?pressure and number of molecules of gas
volume and temperature
pressure and temperature
volume and number of molecules of gas
pressure and volume

Answers

Boyles law is P1V1=P2V2 where P is pressure and V is volume so the answer is pressure and volume

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if eqaul volumes of 0.1 m naoh and 0.1 m hcl arw mixed, the resulting solution will contain a salt and what