6. Test your idea in the previous question by identifying the element for 3 cases
Particles What element? What determines the element?
2. All isotopes are positively charged
3. Second option i think
5. atomic number
10.False I think
1) Answer is: +1.
The proton is subatomic particle with a positive electric charge of +1e elementary charge.
The electron (symbol: e⁻) is a subatomic particle whose electric charge is negative one elementary charge.
Because there is one proton more than electrons, the charge of a substance is +1.
2) Answer is: All atoms are electrically neutral.
For example, atomic number of calcium is 20, it means that it has 20 protons and 20 electrons, so atom of calcium is electrically neutral.
When calcium lost two electrons, it will have 20 protons (positive charge) and 18 electrons (negative charge), which means it has two protons more and it has +2 oxidation number.
Other example, oxygen atom has atomic number 8, it means it has eight protons and eight electrons, so atom has neutral charge.
3) Answer is: Protons are the same size as neutrons, both are bigger than electrons.
The electron has a mass that is approximately 1/1836 that of the proton and the neutron.
Protons and neutrons, each with masses of approximately one atomic mass unit, are called nucleons.
Protons and neutrons are hadrons composed of three valence quarks.
4) Answer is: proton.
One or more protons (p⁺) are present in the nucleus of every atom and the number of protons in the atom is the defining property of an element.
For example, boron (B) is an element with atomic number 5, which means it has 5 protons.
Other example is nitrogen (N) with 7 protons.
5) Answer is: atomic number.
Atomic number (Z) is the number of protons, which is characteristic of a chemical element.
There are 118 unique substances (elements) arranged on an amazing chart that reveals their hidden secrets to anyone who knows how to read it.
The first chemical element is hydrogen (atomic number is 1) and the last is oganesson (atomic number is 118).
Elements are scheduled in periodic table, ordered by their atomic number.
6) Answer is: False.
Protons and neutrons are both centrally located in an atom's nucleus, while negative electrons surround the nucleus in designated shells.
Nucleus of an atom has positive charge, electrons are negative and atom has neutral net charge.
7) Answer is: False.
For example, isotope of fluorine (F-19).
This isotope has:
1) n(p⁺) = 9; fluorine has atomic number Z = 9 (total number of protons).
2) n(e⁻) = 9; in an element, number of electrons and protons are the same.
3) n(n°) = 10; mass number of this isotope is A = 19. Mass nummber is total number of protons and neutrons in a nucleus, so number of neutrons is:
n(n°) = A-Z.
n(n°) = 19-9.
8) Answer is: Due to the dual nature of electrons, we cannot simultaneously know an electron's position and its momentum (path). Measuring one changes the other.
The uncertainty principle was introduced in 1927, by the German physicist Werner Heisenberg (1901 - 1976).
The uncertainty principle states that the more precisely the position of some particle is determined, the less precisely its momentum can be known and vice versa.
9) Answer is: True.
Erwin Schrödinger (1887 - 1961) assume that a wave equation could explain the behaviour of atomic particles.
The Schrödinger Equation was used to solve for the energy levels of the hydrogen atom (H).
The Schrodinger equation is used to find the allowed energy levels of quantum mechanical systems.
10) Answer is: False.
In 1s orbital could be held two electrons.
In 2s orbital could be also held two electrons.
In 2p orbital could be held six electrons.
So total number of electrons is 10.
This is element neon (Ne). Atomic number of neon is 10, it has 10 protons and 10 electrons.
Electron configuration of neon atom: ₁₀Ne 1s²2s²2p⁶.
Helium has the electron arrangement 2, 2. There are two electrons in the first shell and two electrons in the second shell.
Oxygen is the first member of group 16, there are two energy levels in oxygen which are 2,6.
Carbon is in period 2 and is the first member of group 14 (the silicon family).
Chlorine has 7 valence electrons, the electrons are arranged as 2, 8, 7.
Magnesium has 12 protons and 12 electrons. It is the second member of period 3.
1) Which two particles are found in the nucleus of an atom?
The two particles found in the nucleus of an atom are neutrons and protons
Electrons revolve around the nucleus in a particular shell.
C.protons and neutrons
2. The table below gives the atomic mass and relative abundance values for the three isotopes of element M.
The average atomic mass will be calculated as:
average atomic mass =
(23.9850 X 78.99 + 24.9858 X 10.00 + 25.9826 X 11.01 ) / 100
= 24.30 amu
3. A particle that orbits the nucleus in an atom is called an electron
Electron is the negative sub atomic particle which revolves around nucleus in particular orbits.
4. The table below gives the numbers of protons, electrons, and neutrons in four atoms.
The number of electrons are equal to number of protons in a neutral atom of any element
if there is more number of electrons than protons it means it is a negatively charged atom where magnitude of charge corresponds to the number of extra electrons
similarly if there is less number of electrons than protons it means it is a positively charged atom where magnitude of charge corresponds to the number of less electrons
Atom Number of protons Number of neutrons Number of electrons
1 9 8 8
2 9 9 8
3 9 9 10
4 9 10 9
Based on the table, which atom has a charge of –1?
the number of electrons are more in Atom 3
5. Boron occurs naturally as two isotopes. What is the difference between these isotopes?
The isotopes of any element differs in number of neutrons,
Ans"They have different numbers of neutrons and different mass numbers.
6. The diagram below is an artist’s impression of a single atom of element Be. The neutrons are shown with stripes, the protons are gray, and the electrons are black. These particles are not drawn to scale.
Ans: There are two electrons in the given diagram, five neutrons and four protons . the isotope will be one with same number of protons and different mass number. Hence the answer is Be-10
7. The mass number of Fe2+ is 56. How many neutrons are there in a single Fe2+ atom?
The atomic number of Fe is 26
The number of neutrons = 56-26 = 30
8. A scientist uses an accelerator and high energy electrons to study the particles inside the protons of a helium atom. What particles is the scientist studying?
D. the He quarks
9. Which element has 16 protons in its nucleus?
The number of protons is 16 it means it has atomic number of 16
10. The diagram below shows some subatomic particles.
What is the particle that is labeled with a question mark (?) in the diagram?
Quark are the subatomic particles located in neutrons and protons
1. The right answer is electron.
The electron, one of the components of the atom with neutrons and protons, is an elementary particle that has an elementary charge of negative sign. It is fundamental in chemistry because it participates in almost all types of chemical reactions and is an essential element of the bonds present in molecules.
The mass of an electron is 9.109 × 10-31 kg. The electron is about 2000 times lighter than the proton and neutron in the nucleus. The masses of the proton and the neutron are almost identical (10-27 kg).
2. The right answer is rapidly moving electrons.
The chemical, physical and electrical properties of an atom are related to the number of protons in the nucleus, which determines the number of electrons in the electron cloud.
The electron cloud is formed of electrons rotating at high speed around the nucleus in very complex trajectories. The electronic cloud is composed of electrons so its electric charge is always negative.
3. The right answer is Atoms of the same element can have different numbers of neutrons.
Isotopes (of a certain chemical element) are called the nuclides sharing the same number of protons (characteristic of this element), but having a different number of neutrons.
So what characterizes an element is the number of protons.
By extension, isotope is often called a nuclide characterized by its number of protons Z and its number of neutrons N (or its mass number A = Z + N), but without distinction regarding its spin or energy state.
4. The right answer is 8.
The atomic number (Z) is the term used in chemistry and physics to represent the number of protons in an atom. An atom can be schematized as a first approach by a compact agglomeration (atomic nucleus) of protons (p +) and neutrons (n), around which circulate electrons (e-).
5. The right answer is 18.
The relative atomic mass (or atomic weight) is the mass of an atom in particular or a chemical element in general (in which case an isotopic mixture is envisaged) expressed as a multiple of a reference elementary mass that wants to be close to that of a single nucleon. Indeed the mass of an atom is proportional in first approximation to the number of its nucleons (protons and neutrons), said number of mass.
4( atoms of the same element always have different atomic weights)
the number of protons in the atoms of the same type can be different especially in isotopes
: Atoms of the same element can have different numbers of neutrons.
H=Gs, Li=Me, Na=So, K=Bn, Be=Am, Mg=A, Ca=Bo, B=Sc, Al=Lm, Ga=Sk, C=Or, Si=Co, Ge=Ik, N=At, P=Fw, As=Ki, O=Bt, S=Re, Se=Uv, F=T, Cl=Ms, Br=Lq, He=Fl, Ne=Lg, Ar=Nb, and Kr=Sp.
the answer is A. Atoms of the same element can have different number of neutrons
thank you gurl
pie chart because it is in percents ( % )
answer7,570,82356 cubic centimeters;