What kind of particles make up compound
Answers
compounds are composed of elements
elements are composed of sub atomic particles such as electrons and proton
A compound is made of of 2 or more elements. Elements are made up of atoms. So compounds are also made up of atoms because they are made up of elements.
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Alexis predicts that the size of a magnet affects its magnetic properties. She designs anexperiment using magnets of different sizes and paperclips to test her prediction. She takesthree magnets of different sizes (one small, one medium, and one large) and holds them overa container of paperclips to see how many are attracted. Her results are shown in the tablebelow.What should Alexis do next after examining her experimental results?
Answers
The symbol of an isotope that atom of its element contains 50 electrons and 70 neutrons is Tin (Sn).
What is Isotope?
The Isotope may be characterized as one of two or more types of atoms of a chemical element that significantly have the same number of protons but with different numbers of neutrons and therefore different atomic masses.
In a more simple sense, an isotope may be defined as an atom that has the same atomic number but different atomic mass and physical properties.
According to the question,
The number of electrons an atom possesses = 50.
The number of neutrons = 70.
Since, the number of electrons = the number of protons = the atomic mass of an atom = 50.
∴ According to the periodic table, an element having an atomic number of 50 is known as Tin (Sn).
Its atomic mass = the number of protons + the number of neutrons.
= 50 + 70 = 120 amu.
Therefore, the symbol of an isotope that the atom of its element contains 50 electrons and 70 neutrons is Tin (Sn).
To learn more about Isotopes, refer to the link:
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Answers
Answer:
Explanation:
The molarity or concentration of can be found by using the formula;
c is the concentration in M , mol/dm³ or mol/L
v is the volume in L or dm³
n is the number of moles
From the question;
n = 2.1 moles
v = 750 mL which has to be converted to litres
We have the final answer as;
2.8 M
b. photon
c. electron
d. It depends on what the element is.
An atom with two protons, three neutrons and two electrons would have a mass of about how many atomic mass units?
a. 2
b. 3
c. 5
d. 7
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Answers
AgNO3 + NaCl ⇒ NaNO3 + AgCl(s)
The moles of Na+ present:
0.5 L * 0.001 mol/L
= 5 x 10⁻⁴ mol
Moles of Ag+ present:
0.5 * 0.02
= 0.01 mol
The limiting reactant is Na
Therefore, the moles of Ag reacted:
5 x 10⁻⁴
AgCl is insoluble in water; therefore, the AgCl formed will precipitate
Answers
Since you can break pieces off, maybe charcoal ... the real thing, not a "briquet".
Do your hands get all black when you handle it ?