What does the following element description actually mean? 186O. an oxygen atom
Atom
An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical element. Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms. Atoms are extremely small; typical sizes are around 100 picometers (1×10⁻¹⁰ m, a ten-milliont…
Why is helium not adjacent to hydrogen on the periodic table?
Helium, He, is a nonmetallic gas and the second element in the periodic table. Rather than being placed adjacent to hydrogen, H, however, helium is placed on the far right of the table because A. the sizes of their atoms are vastly different. B. they come from different sources. C. hydrogen and helium repel one another.
Which is the second element on the periodic table?
D. made of relatively large atoms. B. in group 2 of the periodic table. About how many elements do you have access to as a consumer of market goods. Helium, He, is a nonmetallic gas and the second element in the periodic table. Rather than being placed adjacent to hydrogen, H, however, helium is placed on the far right of the table because
What group is helium in on the periodic table?
B. in group 2 of the periodic table. About how many elements do you have access to as a consumer of market goods. Helium, He, is a nonmetallic gas and the second element in the periodic table. Rather than being placed adjacent to hydrogen, H, however, helium is placed on the far right of the table because
What is the atomic mass of an element found in another galaxy?
An element found in another galaxy exists as two isotopes. If 80.0 percent of the atoms have an atomic mass of 80.00 atomic mass units and the other 20.0 percent have an atomic mass of 82.00 atomic mass units, what is the atomic mass of the element?
What does the following element description actually mean 186O?
186O. an oxygen atom with 6 protons and 12 neutrons.
Which statement describes how hydrogen 1 and hydrogen 2 differ?
Hydrogen- 2 has one neutron and hydrogen-1 has none.
How many neutrons are in a hydrogen atom?
1Hydrogen / Atomic number
What does the following element description actually mean iron 57 quizlet?
What does the following element description actually mean? iron-57. iron with a mass number of 57. iron with a sum of the neutrons and the protons equal to 57.
What do you mean by H2 and 2H?
H2 is molecular hydrogen. It is bonded together by one single bond. 2H denotes two moles of elemental hydrogen . it should be noted that elemental hydrogen is not bonded to anything. Two separate hydrogen atoms that are not combined as a unit.
Is H2 a compound element or molecule?
This is Expert Verified Answer Explanation: a compound is a molecule that contains two different elements. All compounds are molecule but all molecules are not compounds. H2 which is hydrogen is not a compound but an element as it is composed of a single element.
What is hydrogen made up of?
A molecule of hydrogen is the simplest possible molecule. It consists of two protons and two electrons held together by electrostatic forces. Like atomic hydrogen, the assemblage can exist in a number of energy levels.
What is a hydrogen atom made of?
The hydrogen atom consists of a proton and an electron, and has a spherical symmetry that can most easily be studied using a spherical polar coordinate frame.
How many electrons are in a hydrogen atom?
1Hydrogen / Electrons per shell
What does the following element description actually mean 18 is over 6o?
What does the following element description actually mean? 18. O. 6. a) 6 oxygen atoms with 18 neutrons.
Which of the following is a description of a neutron?
A neutron is a subatomic particle found in the nucleus of every atom except that of simple hydrogen. The particle derives its name from the fact that it has no electrical charge; it is neutral. Neutrons are extremely dense.
What has an atomic number of 2?
He HeliumThe Elements, sorted by Atomic NumberAtomic NumberSymbolName2HeHelium3LiLithium4BeBeryllium5BBoron76 more rows
Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface?
Which statement must be mentioned in explaining why amphipathic molecules line up at a water surface? Polar groups attract one another.
Which one of the following subatomic particles contributes toward the atomic mass of hydrogen?
What subatomic particle contributes toward the atomic mass of hydrogen? Proton.
What is dissolving best described as?
Dissolving is best described as ... a change from a solid to a liquid.
Which of the following explanations accounts for why the partial negative charge in a molecule of water occurs?
A) The partial negative charge in a molecule of water occurs because the electrons shared between the oxygen and hydrogen atoms spend more time around the oxygen atom nucleus than around the hydrogen atom nucleus.
How are atoms ordered in the periodic table?
Atoms in the periodic table are ordered by increasing atomic number.
Is a textbook made of atoms?
Yes. A textbook like all material things is made up of atoms, which are considered to be 99.9 percent empty space.
What is the energy that converts a neutron into a proton and an electron?
c) Heat energy is converting a neutron in to a proton and an electron, which is ejected into the orbit of the nucleus, releasing light energy.
What is the valence shell?
What is the valence shell?#N#a) It is the same as the orbital configuration.#N#b) It is the last partially filled orbital in an atom.#N#c) It is the shell of electrons in element V (atomic no. = 23)#N#d) It is the shell of electrons in an atom that is the least reactive.#N#e) It is the outermost shell of electrons in an atom.
What causes light to be emitted from the electrons?
a) Heat energy is speeding up the orbit of the electrons and the resulting Doppler shift causes light to be emitted from the electrons.
Which part of the nucleus gives off light?
c) The protons in the nucleus are also giving off various light frequencies.
Is a d-atom more massive than an electron?
d) It is much more massive than an electron.
Which atom has a positive charge?
The atomic nucleus is very small but dense and carries a positive electric charge.
What is the gold nucleus able to do?
The gold nucleus is able to deflect alpha particles much like a mirror is able to reflect photons.
Is a photon a quantum?
A quantum is a particle of light while a photon is a wave of light.
What does the number of electrons mean in the periodic table?
If the atom is electrically neutral, the number of electrons corresponds to the atom's atomic number. Using the periodic table, the outermost occupied shell indicates the group while the number of occupied shells indicates the period. An electron configuration is unique to each element, much like its atomic spectrum.
How does the number of occupied shells relate to the atomic number?
The number of occupied shells corresponds to the atom's atomic number. If the atom is electrically neutral, the number of electrons corresponds to the atom's atomic number. Using the periodic table, the outermost occupied shell indicates the group while the number of occupied shells indicates the period.
How many isotopes does boron have?
Boron has primarily two isotopes, one with an atomic mass of 11.0 amu and another with an atomic mass of 10.0 amu. If the abundance of the boron atom with a mass of 11.0 amu is 18.9 percent and the abundance of the other isotope is 81.1 percent, what would be the average mass of the boron atom? Correct Answer.
What is the difference between electrons and proton?
An electron is dropping from a higher to a lower energy level with the difference in energy between the two being emitted as light energy. A proton is undergoing a nuclear change in the nucleus and is emitting a high energy light wave in the process.
What is the atomic mass of bromine?
The atomic mass of bromine is reported in the periodic table as 79.904 atomic mass units. Choose the most likely set of mass numbers for these two bromine isotopes. Br-80, Br-81.
How many amu is carbon dioxide?
A carbon atom has a mass of about 12 amu. Carbon dioxide would then have a mass of 44 amu. A carbon atom has a mass of about 6 amu. Carbon dioxide would then have a mass of 22 amu. Question 15. 0 / 1 pts. Visible light has a frequency range between 7 × 1014 Hz and 4 × 1014 Hz.
What does the outermost shell of a group mean?
Using the periodic table, the outermost occupied shell indicates the group while the number of occupied shells indicates the period.
