True or false is an atom is the smallest building block of matter

Q: The atomic weight of silicon is 28.0855. Round this to 4 significant figures. O a. 28.09 b. 28.1 Oc.…

A: Here we have to round the atomic mass of silicon 28.0855 to 4 significant figure.

Q: What is distinctive about isotopes of elements, and why are they important?

A: The atomic number of an element is expressed as the number of protons and it is equal to the number…

Q: Complete the table

A: Electrochemical cells / Galavanic cells / Voltaic cells :  In these cells chemical energy is…

Q: List the three different subatomic particles present in an atom and their symbol?

A: J.J.Thomson gave some facts to prove that atoms are not the fundamental form of matter. According to…

Q: Fill in the blanks by writing the name of the definition: is a substance made up of only a single…

A: an element is a substance that cannot be broken down into any other substance every element is made…

Q: There are three primary subatomic particles that comprise an atom. (i) Name the three subatomic…

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Q: complete the table

A: If organic compound contains double bond (or) triple bond (unsaturation) reacts with Br2 , this…

Q: Silicon has three naturally occurring isotopes (Si-28, Si-29, and Si-30). The mass and natural…

A: Isotopes are the atoms which have same atomic number and different mass numbers. Isotopes of an…

Q: Differentiate between different isotopes of an element?

A: A number of atoms of some elements have been identified, which have the same atomic number but…

Q: Compare the properties of the following: α particles, cathode rays, protons, neutrons, and…

A: Protons: They are positively charged particles present in the nucleus of an atom. Electrons: They…

Q: The fundamental particle of matter is the A) proton B) electron C) neutron D) atom E) None of the…

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Q: How do isotopes of a given element differ? How are they similar?

A: In the question, it is asked about the isotopes that what are isotopes and in what manner they are…

Q: Sulfur has four isotopes and has an atomic mass of 32.066 amu. The four isotopes have the following…

A: "Since you have asked multiple questions, we will solve the first question for you. If you want any…

Q: 2. The states that the total number of atoms does not change in a chemical reaction. 3. А combined…

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Q: One of the following is not a representative particle 1. atoms 2. ions 3. molecules 4. formula units…

A: A representative particle is the smallest unit of a substance that can be broken down without…

Q: Isotopes of the same element have different mass numbers? true or false

A: isotope are  two or more species of element  with the same atomic number and position in the…

Q: Name each of the following elements : As, I, Xe, He, C, Si

A: Name of the given element- As = Arsenic I= Iodine Xe= Xenon

Q: What is the symbol for neon?

A: Neon is a Nobel gas element. It's atomic number is 10. It is a colourless and orderless monoatomic…

Q: What is an isotope? How are isotopes denoted?

A: Molecular mass is the sum of protons and neutrons of an atom. In the modern periodic table, the…

Q: A silver wire has a diameter of 0.500cm what length of the wire contains exactly 1.0×10²³ atoms of…

A: Given: Diameter of the wire = 0.500 cm  And the number of atoms of Ag wire = 1.0 X 1023 atoms.

Q: Use triangles to represent atoms of element A and circles to represent atoms of element B. Draw an…

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Q: 1. What did Democritus contribute to our modern understanding of matter

A: ANSERE IS DISCUSSED BELOW :

Q: Differentiate between an ion and an isotope

A: In order to differentiate between two species it means the difference between the species needs to…

Q: Which statements about subatomic particles are false?a. Protons and electrons have charges of the…

A: The particles utilized to form any particular atom are named "subatomic particles" and such…

Q: Which of the following statements is correct about atom? An atom does not have mass O For neutral…

A: Note : Since you have posted multiple questions, we are entitled to answer the first only. Please…

Q: Which of the following represent isotopes? 79 B: 35X 78 C: 34X 79 81 A: 24 X B: 5X C: X D: 36X

A: Isotopes are those which have same number of proton but different number of neutron.

Q: An unknown element X has the following isotopes: 1ºX (20.00% abundant, atomic mass = atomic mass =…

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Q: What four fundamental assumptions about atoms and matter make up modern atomic theory?

A: Introduction:     All matter is composed of atoms. Atom is a smallest indivisible particle that…

Q: 2.1. In the following drawing, the green spheres represent atoms of a certain element. The purple…

A: Hey there thankyou for the question.    By law of constant proportion all samples of a pure compound…

Q: Complete the table.

A: Given equation is : Also, Rate of reaction = 0.010 M/s

Q: is chlorine gas an element ?

A: The simplest chemical substance which made up of atoms with the same number of protons and it cannot…

Q: 13. Which of the following are isotopes? a. P3- and Ar b. 1251 and 127| c. O and O2- d. Na* and K*…

A: b) 125I and 127I

Q: Define Isotopes ?

A: Isotopes are atoms of same elements which have same atomic number but different mass number.

Q: A neutral subatomic particle. a) compound b) mixture c) molecule d) neutron e) atom

A: An atom is made up of neutrons, protons and electrons. Protons are positively charged and electrons…

Q: Which of the following is not part of Daltons atomic theory? 1) Atoms of different elements…

A: Daltons atomic theory: All matter is comprised of tiny, definite particles called atoms. Atoms are…

Q: In the early 1800s, an English school teacher, John Dalton, proposed six postulates on what an atom…

A: Atom can be divid example  Proton neutron electron  Isotope are present so same element can have…

Q: Which one of the following statements regarding subatomic particles is true? a. Electrons have a…

A: An atom consists of three sub-atomic particles namely, electrons, protons, and neutrons. Electrons…

Q: A generic element, Q, has two isotopes, 195Q and 190Q, and an average atomic mass of 191.86 amu. The…

A: Given- Average atomic mass of Q = 191.86 amu Natural abundance of isotope 195Q = 38% Natural…

Q: Three sceintists that particpated in the discovery and invention or contributed to the early atomic…

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Q: Which subatomic particles have a negative charge?

A: A typical atom consists of three subatomic particles: protons, neutrons, and electrons. Protons and…

Q: graphical information (socioeconomic background, family, education), his inital research focus, and…

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Q: From the statements about subatomic particles which is FALSE? Protons have about the same mass…

A: The statement Protons have about the same mass as electrons is FALSE. This is because the mass of a…

Q: Explain how the isotopes of an element are alike and how they are different.

A: An atom is composed of protons, electrons, and neutrons. The protons and neutrons are present in the…

Q: Identify as true (T) or false (F): | Minerals separating from flowing water as stony deposits…

A: Since you have posted questions with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: Why are isotopes important?

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Q: Which statement about a neutron is not correct? A It can be present in different numbers in atoms of…

A: Since you have asked multiple questions, we will solve the first question for you.  If you want any…

Q: Currently, the atomic mass unit (amu) is based on being exactly one-twelfth the mass of a carbon-12…

A: The mass of an atom is not only due to the sum of the masses of the neutrons, protons and electrons…

Q: How is the chemical symbol of an element determined? Explain in 200 words.

A: Given : Elements  To find : Chemical symbols Solution : Elements are those Compounds which cannot be…

Q: Describe the relationships among matter, atoms, and molecules.

A: To describe: Relationships among matter, atoms, and molecules.

Q: The volume of a single strontium atom is 4.15 x 10-23 cm³. What is the volume of a strontium atom in…

A: It is a volume unit conversion problem where we are asked to convert the volume from cubic…

Group 14 Elements

The following elements come under group 14 of the periodic table.