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Chemistry

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Roxane Bode

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โˆ™ 2021-10-14 18:35:13
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Cards in this guide (28)
How many electrons does oxygen have

An electrically neutral oxygen atom has eight electrons, one for each proton in its nucleus. Two electrons are in the inner shell and six are in the outer shell.

How many electrons does lead have

Lead has 82 Protons, 82 Electrons, and 125 Neutrons. It also has a melting point of 327.5 degrees C (or621.5 degrees F)

What is the mass number of an element that has 30 protons 35 neutrons and 30 electrons

65

What are the divisions within a shell called

The divisions within a shell are known as subshells.

What is an average atomic mass

An average atomic mass is the weighted average of the atomic masses of the naturally occurring isotopes of an element.

Consider the silicon-29 isotope How many protons neutrons and electrons will it have

14 protons, 15 neutrons, and 14 electrons

Why should the stopper of a chemical reagent container be handled carefully

The stopper of a chemical container should be handled carefully to avoid contact of a dangerous chemical with the skin. Careful handling is also key to preventing contamination.

What does the symbol PO-210 represent

The symbol Po-210 represents the isotope of Polonium with a mass number of 210.

An imaginary element Y occurs 30 percent of the time with a mass of 57.9 amu The remaining sample of Y has a mass of 60.9 amu What is the average atomic mass of Y

The average atomic mass of Y would be 60.0 a.m.u.

The symbol Po-210 represents an

Polonium -210, this unstable isotope of Polonium (named after Poland) is an alpha emitter with a half life of 138.376 days, it decays into Pb.

Calculate the average atomic mass of an unknown element that has two naturally-occurring isotopes The first isotope occurs 75.47 percent of the time and has a mass of 248.7 amu The second isotope occu

the atomic mass is -(248.90)

By referring to the periodic chart indicate which is the mass number of copper

63.546

George intentionally threw a snowball directly at Chris The fact that the snowball will continue in the direction of Chris after leaving George's hand is an example of the snowball's

inertia

What is the mass number of Pb

207.2

Classify this property as homogenous or heterogenous Click on the correct answer

homogeneous

Classify this property as intensive or extensive height

extensive

An atom has an atomic number of 56 yet has a mass number of 137 amu Evaluation of this data indicates that the element is

barium

Select the answer that correctly indicates the number of protons and electrons for this atom or ion Sulfide ion

16 protons and 18 electrons

How many protons neutrons and electrons will positive two ion of calcium have

20 protons and 18 electrons

The smallest part of matter that retains its own chemical properties are called

The smallest part of matter that retains its own chemical properties is called a(n) _______.

An atom.

Can you make a scene name from my name Elle

Elle Envy

Elle Ebonize

Elle Echo

Elle Electric

Edible Elle

Elle Execute

that's all i can come up with

Elleicous

What is the atomic number of this element of PB

The atomic number for the Element Lead is 82.

How many significant digits are in 1.076000

This number has seven significant digits.

What is the mass number of this element 82 pb

Mass number refers to a particular isotope of 82Pb.

How many electrons and protons lithium have

The element lithium has 3 protons and 3 electrons.

How many protons and electrons are in sulfide and ion

The sulfide ion has 16 protons and 18 electrons.

How many signoficant digits are in this number 74.30

There are 3

What's the adverb for deep

a word or an expression that modifies a verb, adjective, another adverb, determiner, clause, preposition, or sentence

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