45. List the symbol and atomic number of each element.(a) carbon(b) nitrogen(c) sodium(d) potassium(e) copper

Q: Which subatomic particle was discovered by researchers working with cathode-ray tubes?

A: Cathode ray tube experiment Cathode ray tubes are sealed glass tubes are sealed glass tubes that are…

Q: What are some flaws in Dalton's atomic theory?

A: Given:- What are some flaws in Dalton's atomic theory?

Q: In the following diagram, blue spheres represent the element A and yellow represent the element

A:

Q: How are the concepts of an atom and an element related? What causes elements to differ?

A: A particular atom will have the same number of protons and electrons and most atoms have at least as…

Q: Can neutrons in the nucleus of a particular element do vary ?

A: Atom consist an nucleus having positive charge. Nucleus consist proton and neutron.

Q: 4. If you were given an antique piece of jewelry and you were told that it was made of solid gold,…

A: There are several tests that are used to detect the purity of gold used by jewelry manufacturers…

Q: What element has a symbol of K?

A: An atom is the basic and fundamental unit of matter. An atom consists of electron and the nucleus in…

Q: Describe the early Greeks' idea of the atom?

A:

Q: pretend that an atom has 25 protons, 20 electrons, and 30 neutrons. What is that charge?

A:

Q: Which of the following elements would be classified as a nonmetal? a.) silicon  b.) francium c.)…

A:

Q: For each of the elements Na, Ni, Al, P, Cl, and Ar, providethe following information:a. Which are…

A: In the periodic table, elements are arranged as a function of their atomic number. There is a…

Q: How are the isotopes of an element different from one another?

A: Isotopes are atoms of the same element which are different in mass. That means They have the same…

Q: An isotope of mercury has 80 protons and 120neutrons. What is the mass number of this isotope?

A: The atom consists of 3 subatomic particles: Protons: They are positively charged particles present…

Q: Provide a definition for the term atom

A: Answer  Definition of atom

Q: which of three subatomic particle was discovered first - the proton, neutron or electron?

A: The subatomic particle out of the three that was discovered first is to be identified- the proton,…

Q: What subatomic particle is the primary concern of chemistry?

A: Bohr model gives information about three basic subatomic particles.

Q: What are the "A" group numbers for Aluminum, Calcium, and Cesium, respectively?

A: In chemistry, a group refers to a column of elements in periodic table. In total there are 18 groups…

Q: If a neutral atom of an element has 19 electrons and 14 neutrons, its atomic mass is??

A: Given  Number of electron = 19 Number of neutron = 14  atomic mass = ?

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: What is the symbol for phosphorus?

A: Given :- name of element = phosphorus  To determine :- it's symbol

Q: Find the number of protons, electrons, neutrons of and symbol of Tungsten.

A: The number of protons, electrons, neutrons of and symbol of Tungsten has to be given,

Q: Electron- Proton- Atomic number- Atomic mass- Neutron- Nucleus- C. Isotopes or Different Elements?

A: A typical atom is made up of subatomic particles that include electrons, protons, and neutrons.…

Q: Indicate the isotope having 12 protons, 11 neutrons and 12 electrons.

A: We have to predict the element symbol.

Q: How is the chemical symbol of an element determined? Write in Essay form.

A: An element is defined by it's number of elements . Till now there are totally 118 number of elements…

Q: What is a family or group of elements?

A: Elements: These are the basic pure substances from which chemical compounds can be formed. To define…

Q: .What is the difference between the number of electrons in an atom of selenium, Se, and the number…

A: The number of electrons of an atom is equal to the atomic number of that atom. These are the…

Q: Enter the appropriate symbol for an isotope of phosphorus-32 corresponding to the isotope notation…

A: The term isotopes can be defined as the variants of a given chemical element that differ in neutron…

Q: for elements (Br, Ca, Fe, Na, S, Si, and Xe) which of the following term(s) apply? a. metal b.…

A: To classify the elements we have see in which block of the periodic table  the given element is…

Q: What is the chemical element? X

A: Here we have asked about the information for the chemical element 'X'. We can tell about this as…

Q: The existence of isotopes violates one of the original ideas of Dalton’s atomic theory. Which one?

A:

Q: What defines an element?

A: An atom can be considered as the smallest unit of any matter. An atom is composed of certain…

Q: Where do I find the charge of the elements in the periodic table?

A:

Q: What is correct from multiple choice

A: Since the symbol of Hydrogen is H and not He Hence option b is correct answer

Q: the element manganese (Mm

A:

Q: Summarize the history of the atomic idea?

A: Greek philosophers. Leucippus and Democritus put forward the idea of atoms as far back as the fifth…

Q: Part C An atom has a mass number of 27 and 14 neutrons. What is the atomic number of this atom?…

A: Mass number & Number of neutrons are given.

Q: Distinguish between Democritus’s ideas and Dalton’s atomic theory.

A: Democritus's ideas and Dalton's atomic theory both describes the nature of matter in terms of atoms.…

Q: How is the chemical symbol of an element determined?

A: The chemical symbols of the elements can be determined as follows;

Q: 6. Tungsten is atomic number 74 on the Periodic Table. Supply the indicated information for a…

A: Given,  Atomic number of Tungsten = 74  184W  mass number = 184

Q: On a distant planet, the element silver has an average atomic mass of 107.94 amu and only two…

A: Average atomic mass of silver = M = 107.94 amu  Atomic mass of mass of one isotope (Let isotope A) =…

Q: Protons and electrons have charges of the same magnitude but opposite sign. true or false?

A: A question about charge and magnitude relationship between protons and electrons.

Q: Give a Characteristics of an Atomic?

A: Solution-   An atom has three subatomic particles The nucleus has a well-charged atomic center and…

Q: The diameter of a carbon atom is 1.54 A° . (a) Express thisdiameter in picometers. (b) How many…

A: (a)

Q: represent the same element?

A: we know,In atom the number of protons and electrons are equal but different neutrons is possible.so…

Q: Who was the first scientist to classify elements according to their properties?

A: There are over hundreds of elements known to us. To avoid confusion, scientists need to classify…

Q: mass of an atom of gold in mm

A: Here we have to calculate the mass of gold in terms of mm( millimeter). Mass of gold = 196.96657…

Q: The radius of a tantalum atom is 142 pm. How many tantalum atoms would have to be laid side by side…

A: The radius of tantalum atom =142 pm=142 x 10-12 m 1 pm = 10-12 m Diameter of tantalum atom =2 x 142…

Q: What is a diatomic element

A: An element is defined as a substance which contains only one type of atom. For example, a piece of…

Group 14 Elements

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