Chlorine has 17 electrons. According to the modern atomic theory, how many electrons are found in n = 2? 8 2 7 17

Q: The outer shell electrons in metals are not tightly bound to the nuclei of their atoms. They are…

A: Given:  The electrons which are loosely bound.

Q: Write the electronic structure of the elements of the alkali atoms (Na, K, Rb, Cs).

A: 1) Na It is named as sodium It has atomic number 11 and hence its electronic structure is given as-…

Q: O 6 L O 7L 8L 9 L O 10 L О 12L O 14 L О 16L O none of the above

A:

Q: Give the ion notation for an atom with 15 protons and 18 electrons.

A:

Q: Which of water, iron, ammonia, chromium, radon, and silicon are chemical compounds as opposed to…

A: We have to write the chemical compounds as opposed to elements

Q: To become a positive ion, does an atom lose or gain an electron?

A: Step 1Atoms consists of neutrons, protons and electrons. Out of these, neutrons are neutral…

Q: In a scanning electron microscope, select the correct answer Select one: O a. can be used to image…

A: In a scanning electron microscope, the electron beam can penetrate through all the sample

Q: spectra can be broadly classified into two categories. They are: a.) Atomic and molecular spectra…

A: Required : Classification of spectra :

Q: Give the ion notation for sulfur with 18 electrons

A: Given: The ion of sulphur has 18 electrons.   The atomic number of sulphur is 16, which means that…

Q: What is the atomic number for the element platinum? 78 47 195 56

A: To determine Atomic number of element platinum

Q: Write the complete nuclear symbol (with neutron number) for each. (Enter your answer in the form…

A: Isotopes of an element have same atomic number but different mass number. Different isotopes of an…

Q: The outermost shell is known as.., and electrons that are in orbits farther from nucleus are…

A:

Q: An electron is 0.5 Å away from a carbon nucleus which contains 6 protons. Find the mutual force of…

A: Given : r = 0.5 Å q1 = -e (for electron charge is negative) q2 = 6e 1Å (Angstrom)= 10^-10m…

Q: A bromine atom has an atomic number of 35 and an atomic mass of 80. What is the structure of this…

A: Given data: Atomic number, z=35 Mass number, A=80

Q: Which characteristic tells you an element is likely a non-metal? Has a shiny/metallic luster Not a…

A: Which characteristic tells you an element is likely a non-metal  .The non-metals are elements on the…

Q: A small cube of iron is observed under a microscope. The edge of the cube is 3.00 x 10-6 cm long.…

A: Given :     Edge of the cube, a = 3 x 10-6 cm     Atomic mass of iron, m = 55.9 u     Density of…

Q: Both statements are true.  Both statements are false.  First statement is true and second is false…

A: Answer:- Both statements are true.    Statements 1. To maintain electric neutrality, an atom must…

Q: Give the ion notation for an atom with 20 protons and 18 electrons

A: Introduction: Ion is defined as an atom that does not have an equal amount of electrons and protons.…

Q: The mass of an atom is measured in atomic mass units. One atomic mass unit is equal to 1.66x10-27…

A: The masses of atoms and subatomic particles are very small.

Q: Which element is a member of the halogen family? A B B I D K

A: In this question we are have to answer which element is a member of the halogen family.

Q: An atom becomes a positive ion because? A) atom is losing some of its electrons B) Atom gains…

A: An atom is considered to be made up of protons and neutrons (which constitute the nucleus) and…

Q: From their location in the Periodic Table, which of the following elements tend to lose 2 electrons…

A: The periodic table elements, tend to lose or gain electrons in order to reach stable configuration…

Q: Fill in the blanks with the missing items. Refer to the periodic table of elements The first one…

A: We use the properties: Atomic number = no of electrons Atomic mass = no. of protons + no. of…

Q: Which of the following statements is NOT true regarding electric charges? a. A neutral atom contains…

A:

Q: If an atom has an overall negative charge, the number of electrons must be fewer than the number of…

A: An electron has the negative charge and proton has the positive charge. When the number of electron…

Q: A restaurant put up some neon lamps. “Neon” lamps are not just neon. They have various gases that…

A:

Q: The density of sodium is 0.97 g/cm3 Calculate its atom density

A: Given, The density of sodium is 0.97 gcm3 We know, Molar mass of sodium is 23.0 gmol  Avogadro…

Q: Molybdenum has an atomic radius of 0.145 nm. The volume of its cubic unit cell is 0.0375 nm3 . What…

A: radius (r) = 0.145 nm Volume = 0.0375 nm3

Q: Argon and potassium are neighbors in the periodic table but have very different sizes—a potassium…

A: The ionization energy is the minimum energy required to remove the electrons from the outermost…

Q: According to the modern atomic theory, how many electrons are found in n = 2?

A: According to modern atomic theory ,nth shell can have maximum  2(n2) electrons.

Q: 2. Spectrum of the specific wavelengths at which compounds absorb 4. is measured in the…

A: Answer 2 : Absorbtion is maximum at around                      510 nm at which all subjects…

Q: how much charge is present in a container havinf 1 atom of hellium

A: SOlution:

Q: The different colours seen in exploding fireworks are produced using different elements. Element…

A: When a firework is exploded it reacts with oxygen. When it reacts with oxygen the electrons are…

Q: Sketch a model of Carbon-13 with a (-2) charge. - Include the number of protons, neutrons, and…

A: Carbon-13 is an isotope of carbon that contains 6 protons, 7 neutrons and 6 electrons. It has no…

Q: Question 7 of 20 Based on their locations on the periodic table, which two elements would you expect…

A:

Q: What happens to the properties of elements across any period of the periodic table?   Question 3…

A: The properties of the elements gradually change across any period of the periodic table…

Q: In the periodic table, elements are classified as ____________ according to their properties and…

A: Periodic table contains all the known elements in a well arranged manner according to their physical…

Q: Four marbles are made of different metals. Each marble has the same mass, but a different volume.…

A: Scenario - Four metals have same masses but different densities, hence has different volumes. Given…

Q: 20 20 a d 42 20 3Ω h

A:

Q: Chromium is BCC crystal structure and has atomic weight of 52.0 g/mol and density of 7.19…

A:

Q: Using the periodic table, Terry draws a model of a helium atom and a hydrogen atom. Match the number…

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

Q: Which of these elements has an electron structure MOST similar to that of element X? a.) 3 b.)2…

A: Element X

Q: The metal molybdenum becomes superconducting at temperatures below 0.90 K. Calculate the temperature…

A:

Q: What is the essential role of atomic number in creating new elements?

A: Atomic number is total number of electrons in atom. Most of the properties depend on valency of…

The Bohr model

Students often get confused between Rutherford’s model and Bohr model of an atom. They interpret the postulates of both these models to be the same, which is incorrect. Rutherford’s model differs from Bohr’s model in the following ways: