Fill in the nine gaps in this table. Element symbol     Mg     Protons   20   Neutrons   20   Electrons     23 Mass number

Q: What is the value of the expression 1/2 (3x - 5) +5 when x= -3? A. 2 OB. 4.5 O C. -2 D. 7

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Q: How many neutrons does the following isotope of oxygen have? O 18 0 8 O 10 O 26 O 18

A: Given data: The isotope of oxygen O818 Required: Number of neutrons

Q: Ā = 3.0N, 150°, what is the x-component? A) -1.5 B) 1.5 C) -2.6 D) 2.6

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Q: The mass ofan electron is about equal to the mass of a proton. OTrue O False The sum of the numberof…

A: To determine: Whether the given statements are true or false. (a) The mass of an electron is about…

Q: 40. Balance the following equation: 239- Th 90 239 U 239 94 2381 94 Pu 239 93

A: Given data:  N93239p → .....+ e-10 Required: Balance the equation

Q: What are the positively charged particles of an atom called? A. ELECTRONS B. ELECTRON CLOUD C.…

A: To determine Positively charged particles of an atom

Q: Ionization energy is the energy needed to eject an electron from an atom. Compute the ionization…

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Q: What is the number of protons, neutrons, and electrons for element has; atomic number 9, mass number…

A: The given problem is based on atomic physic, To solve the given problem we will define the mass…

Q: 70 3Ga element: atomic #: # neutrons: # electrons: 31 15 p3- element: atomic #: # electrons: atomic…

A: Solution: To find element name, atomic mass, neutron, proton and electron

Q: Direction: Answer the following. 1. This particle is found in the nucleus and has no charge a.…

A: Given: The particle is found in the nucleus and has no charge. To choose correct option provided…

Q: Element X has three naturally occurring isotopes. The masses (amu) and % abundances of the isotopes…

A: Dear student The average atomic mass of an atom can be found by : Mav = f1m1 + f2m2 + f3m3 Where f…

Q: What does the following element description actually mean? Na +1 A. Sodium atom with 12 protons, 11…

A: The periodic table tells us that sodium atom (Na) has an Atomic Number of 11, so there are 11…

Q: Describe the principle of the experiment which established the nuclear model of an atom explaining…

A: SOlution: to describe the experiment which has establisehd the nuclear model of an atom.

Q: The term photon refers to: A) light ray B) sub atomic particle C) radiation D) None of the above

A: The term photon refers to sub atomic particle.

Q: Describe atomic spectra using the terms of electron shells, emission, absorption, and wavelengths.

A: Atomic spectra:When electron in an electron shell makes a transition from one electron shell to…

Q: 28. A core of and grouped together surrounded by Which of the following best completes the above…

A: In an atom the protons and neutron constitute the core or nucleus and the electrons are in motion at…

Q: The diameter of an atom is 1.2 × 10-10 m and the diameter of its nucleus is 1.0 × 10-14 m. What…

A: Diameter of the atom R=1.2 × 10-10 m The diameter of the nucleus r=1.0 × 10-14 m Consider both atom…

Q: What energy (in Joules) is released when an electron in a hydrogen atom falls n=5 to n=2?

A: electron in a hydrogen atom falls n=5 to n=2.

Q: What subatomic particle was used by Enrico Fermi in reactions of bombardments O a-particle O…

A: In 1934 Italian physicist Enrico Fermi started bombarding elements with neutrons instead of protons…

Q: Select one or more: a. The model suggested presence of electrons orbiting the heavy nucleus. b. The…

A: Bohr model suggested presence of electrons orbiting the heavy nucleus in that orbit which is…

Q: How many neutrons would you find in the isotope Gold-199 79 Au Gold 196.967 O 79 O 199 197 O 120

A: Write the given values with suitable variables. A=79M=199 Here, A denotes the atomic number and M…

Q: What determines the identity of the element? Atomic MASS (# of protons and neutrons) Atomic NUMBER…

A: What determines the identity of the element ?

Q: After removing two electrons from helium atom it become? A) UV rays B) Alpha particle C) Gama…

A: There are three types of Ionizing radiation.                       1) Alpha radiation…

Q: A nuclide of the element plutonium Pu-242. What is the number of neutrons in its nucleus

A: Given data: The nuclide of plutonium Pu-242 Required: The number of neutrons (N)

Q: Energy levels The diagram on the left shows several energy levels for a hydrogen atom. Four possible…

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Q: Identify all true statements from the following. O The nucleus of an atom contains only neutrons. O…

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Q: The hydrogen atom's nucleus is a proton (mass 1.7 x 1027 kg), outside of which there is a single…

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Q: Direction: A. Complete the table below by filling the blanks with the correct value. Mass Number…

A: The  problem is based on nuclear physics, To solve the given problem we will define atomic number…

Q: Explain the structure of the atom in general

A: Solution

Q: 2) The nucleus of an atom is made up of   Group of answer choices   A)protons and neutrons…

A: The nucleus of an atom consists of positive charge and neutral charge.

Q: Consider the Bohr model as applied to the following threeatoms: (A) neutral hydrogen in the state n…

A:

Q: ?The definition of the atomic number is

A: In this question, We have to discuss about the definition of atomic number.

Q: 8:The bottom number on element symbol represented by the "Z" below is the total number of…

A: Required : The bottom number on element symbol represented by the "Z" below is the total number of…

Q: A region in space around a nucleus where there is a high probability of finding an electron is…

A: Generally in Bohr model of hydrogen atom, the Bohr orbit is referred as the path that electron…

Q: Fill in the nine gaps in this table. Element symbol K 19 7 Protons 16 Neutrons 20 18 16 Electrons 19…

A: Mass number is the total number of protons and neutrons in the nucleus.

Q: Convert 259 J to nanogram*m O 2.64*10^13 O 2.64*10^10 O 2.11*10^14 O 2.11*10^9

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Q: Find the energy required to excite a hydrogen electron from the ground state to n = 4

A: Here we use Rutherford model

Q: The mass defect is the result of what action occurring? A) mass being converted to energy when…

A: Given that, Mass defect

Q: The characteristic wavelengths of light absorbed by and emitted from an atom is known as the atom's:…

A:

Q: Give the ion notation for an atom with 6 protons and 2 electrons

A: Given: The ion has 6 protons and 2 electrons ,  let atom be represented by A   We know that for…

Q: Write the appropriate symbol (with A, Z and the element symbol) for an yttrium isotope that has 39…

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Q: The value of A in the element symbol below determines the isotope of the atom.

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Q: Which of the following statements regarding the Rutherford model of the atom is correct? O The…

A: Rutherford model: On 1909, Sir Earnest Rutherford devised and performed an famous experiment called…

Q: The speed of the electron in the Bohr theory of hydrogen is   a. proportional to n2.   b.…

A: In the given question we have to discuss about the speed of the electron in the Bohr theory of…