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Chemistry > Unit 3 > Flashcards

Unit 3 Flashcards

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1
Q

How many valence electrons does Calcium have?

A

2 It’s in Group 2.

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2
Q

How many valence electrons does Bromine have?

A

7 It’s in Group 17.

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3
Q

How many valence electrons does Helium have?

A

2

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4
Q

How many valence electrons does Neon have?

A

8

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5
Q

Which element, Xenon or Lithium, has a full outer shell of electrons?

A

Xenon; it is a noble gas, group 18

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6
Q

Which has the highest electronegativity, Neon or Oxygen?

A

Oxygen. Reason: Neon is a noble gas and thus has 0 electronegativity.

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7
Q

Which has the highest ionization energy, Mg or Sr?

A

Mg Ionization decreases as it goes down the group.

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8
Q

Which has a smaller atomic radius, Ag or Xe?

A

Xe Atomic radius decreases across the period from left to right.

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9
Q

Which has a smaller ionic radius, Li or Li+?

A

Li+

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10
Q

Which has a smaller ionic radius, F or F-?

A

F

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11
Q

Elements in the same group have the same number of _____ ______.

A

valence electrons

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12
Q

What is the most important characteristic in determining an element’s chemical properties?

A

the number of valence electrons it contains

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13
Q

Which group will have an electron configuration that ends in s²?

A

Alkaline Earth metals

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14
Q

What element is this electron configuration showing, 1s²2s²2p⁶3s²3p⁶4s²3d⁶?

A

Fe

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15
Q

Which element is this showing, [Ar]1s¹?

A

K

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16
Q

Which property describes how much energy must be added to an atom to remove an outermost electron?

A

Ionization energy

17
Q

Which element has the highest atomic radius?

A

Fr

18
Q

Which group is the noble gases?

A

Group 18

19
Q

Which element has the highest electronegativity?

A

F

20
Q

The majority of transition metals are in which block? s,p,d, or f

A

d

21
Q

Unknown element X has 5 energy levels, 5 valence electrons, and is a metalloid. What is X?

A

Sb

22
Q

The main energy level that can hold only two electrons is the _____.

A

first level

23
Q

Which element has the greatest electron affinity?

A

F

24
Q

Which of the following (UV light, radio waves, x-rays, gamma rays) has a longer wavelength?

A

radio waves

25
Q

Which of the following (UV light, radio waves, x-rays, gamma rays) has a higher frequency?

A

gamma rays

26
Q

What is the order of visible light from lowest to highest frequency?

A

ROY G BV red orange yellow green blue violet

27
Q

Element X has many of the same physical and chemical properties as Mg and Sr but has a lower atomic mass? Is it Na or Be?

A

Be

28
Q

Elements in the same _____ have chemical properties that are the most similar.

A

group

29
Q

Which element (Co or Cd) has 10 electrons in the d orbital?

A

Cd

30
Q

What is the frequency of light with a wavelength of 2.00 x 10⁻⁸m?

A

speed of light /wavelength = frequency (3.00x10⁸m/s)/(2.00x10⁻⁸m)= 1.50x10¹⁶Hz

31
Q

What is the wavelength in m of a photon that has an energy of 2.2 x 10⁻²⁰J?

A

(Plancks constant)(speed of lite)/Energy=wavelength (6.63x10⁻³⁴Js)(3.0x10⁸m/s)/(2.2x10⁻²⁰J)=9.0x10⁻⁶m

32
Q

What is the frequency of a photon with energy of 2.0x10⁻²⁵J?

A

(energy)/(Plancks constant)=frequency (2.0x10⁻²⁵J)/(6.63x10⁻³⁴Js)=3.0x10⁸Hz

33
Q

Find the energy of a photon with a frequency of 5.0x10¹⁴Hz.

A

(Planck’s constant)(frequency)=energy (6.63x10⁻³⁴Js)(5.0x10¹⁴Hz) = 3.3x10⁻¹⁹J

34
Q

Find the frequency of a photon with a wavelength of 5.0x10⁻⁷m.

A

(speed of light)/(wavelength)=frequency (3.0x10⁸m/s)/(5.0x10⁻⁷m)=6.0x10¹⁴Hz

35
Q

Label a wave with trough, crest, wavelength. and amplitude.

A
36
Q

What is the orbital diagram for Nitrogen?

A

Chemistry (11 decks)

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