Chem !; Test !

1

Determine the total number of electrons present in the atom, molecule or ion below: N2

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A gamma ray of wavelength 1.00 X 10^-8 cm has enough energy to remove an electron from a hydrogen atom

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How many protons are in a 127 I- ion?

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Determine the total number of electrons present in the atom, molecule or ion below: BH3

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Which of the following pairs can be used to illustrate the law of multiple proportions?

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After an anion has lost an electron it becomes a/an and has a charge.

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Which one of the following substance is not a chemical compound?

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When strontium salt is ignited it burns with a red flame. The frequency of the light given of by this flame is greater than

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How many electrons are present in Be2+ ion?

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A pure substance composed of two or more different elements is a(n)?

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An atom containing 34 Protons 43 Neutrons and 34 electrons would have the symbol?

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The scientist who discovered the law of conservation of mass and is called the father of modern chemistry is?

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Which of the following is incorrect?

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Mendeleev is given the most credit for the concept of periodic table elements because:

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Wherever it is found water always contains oxygen and hydrogen in the mass ration 8 to 1. taken by itself this fact demonstrates what natural law?

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Rutherford bombarded gold foil with alpha (a) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

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which of these isotopes have the greatest number of neutrons?

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which of the following is an example of quantitative observation?

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Fe has that is unpaired in it's d orbitals

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Infrared radiation from the sun has a wavelength of 6200nm. Calculate the energy of one photon of that radiation

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How many protons and electrons are present in Br- ion?

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An atom of the isotope chlorine-39 consists of the photons, neutrons and electrons?

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Which mass law is demonstrated here?

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The chemist credited for inventing a set of symbols for writing elements and system for writing the formulas of compounds (and for discovering selenium, silicon, and thorium) is:

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A is a pure substance that is composed of only one type of atom.

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What is the correct symbol for Potassium?

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[Ne]3s^2 3p^5

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The first scientist to show that atoms emit any negative particles was?

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Rutherford's experiment with alpha particles scattering by gold foil established that?

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The scientist who discovered the law of conservation of mass and is also called the modern father of chemistry?

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What is the name of the element with the symbol Cr?

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Consider the following two compounds: H20 and H2O2, according the the law of multiple proportions the ration of hydrogen atoms per gram of oxygen in H2O to hydrogen atoms per gram of oxygen in H2O2 is

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What is the I quantum number for 4f orbitals?

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How many electrons in an atom can have the quantum numbers n=3, I=2?

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Which subatomic particle was discovered using cathode ray?

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Bluetooth headsets use microwave radiation with a wave length of 12.32cm, what is the frequency of the light given of the electromagnetic radiations (s-1) Enter is expo format.

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J.J Thompson

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What is the number of Neutrons and electrons in the ion 209Bi2+

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Who is credited with discovering the atomic nucleus?

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Which inventor is mismatched?

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Determine the total number of electrons present in the atom; NH4+

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Which mass is demonstrated by the observation that a sample of potassium chloride from Chile contains the same percent by mass of potassium as one from Poland?

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Which of the following is classified as an element?

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Which of the following statements refers to the Heisenberg uncertainty principles?

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A hypothesis is a

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The number of nucleons (Protons and Neutrons) in a 236U2+ nucleus?

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All of the following are true except?

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According to the Aufbau principle which sublevel is filled after the 5s sublevel?

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What is the atomic mass for the halogen that lies in period 5?

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Which of the following sets of elements have the [noble gas] ns^2 np^2

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How many unpaired electrons are there in the ground state of a manganese atom?

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How many unpaired electrons are there in a manganese atom?

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Rank the following atoms in order of the largest to the smallest atomic radius: Al, P, Cl, K

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Larger first ionization energy, Li or Be?

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Which of the following process represents the ionization energy of bromine?

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How many electrons can be contained in the orbitals of a subshell with I=3?

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In a given period this group has the element with the largest atomic radius.

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What set of the elements below includes just the nonmetals?
GA, P, Ra, Li, La, Xe

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Which of these subshells is incorrect?

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Which of the following subshells in a typical polyelectronic atom fills last?

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In a modern periodic table, the order in which the elements are placed is based on

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Which of the following atoms is a non-metal?

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Hydrogen and lithium react very differently, although they are both members of Group 1. What is the primary reason for this difference?

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With increasing value of the quantum number l, subshells are named s, p, d, f, g, h, i, etc.

How many l=4 orbitals are allowed in a l=4 subshell?

Enter your answer as a whole number without units.

1

Consider the following orderings.

I.
Na + < Mg 2+ < Al 3+ < Si 4+
II.
Be < Mg < Ca < Sr
III.
I < Br < Cl < F
IV.
Al < Si < P < Cl
Which of these give(s) a correct trend in ionization energy?

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Ionization energy increases with an increasing number of electrons

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An atom of which of the following elements has the smallest atomic radius?

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Determine the number of unpaired electrons in ground state atoms of P and Cl, respectively.

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What is the number of unpaired electrons in sulfur atom?

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Give the ground-state electron configuration, symbol, and group number from each partial (valence-level) orbital diagram.

Chemistry Quiz am Chem !; Test ! , erstellt von Brianna Lalinde am 13/02/2022.

Chem !; Test !

Determine the total number of electrons present in the atom, molecule or ion below: N2

A gamma ray of wavelength 1.00 X 10^-8 cm has enough energy to remove an electron from a hydrogen atom

How many protons are in a 127 I- ion?

Determine the total number of electrons present in the atom, molecule or ion below: BH3

Which of the following pairs can be used to illustrate the law of multiple proportions?

After an anion has lost an electron it becomes a/an and has a charge.

Which one of the following substance is not a chemical compound?

When strontium salt is ignited it burns with a red flame. The frequency of the light given of by this flame is greater than

How many electrons are present in Be2+ ion?

A pure substance composed of two or more different elements is a(n)?

An atom containing 34 Protons 43 Neutrons and 34 electrons would have the symbol?

The scientist who discovered the law of conservation of mass and is called the father of modern chemistry is?

Which of the following is incorrect?

Mendeleev is given the most credit for the concept of periodic table elements because:

Wherever it is found water always contains oxygen and hydrogen in the mass ration 8 to 1. taken by itself this fact demonstrates what natural law?

Rutherford bombarded gold foil with alpha (a) particles and found that a small percentage of the particles were deflected. Which of the following was not accounted for by the model he proposed for the structure of atoms?

which of these isotopes have the greatest number of neutrons?

which of the following is an example of quantitative observation?

Fe has that is unpaired in it's d orbitals

Infrared radiation from the sun has a wavelength of 6200nm. Calculate the energy of one photon of that radiation