Which of the statements about properties of emission spectra is FALSE? (select only one of the following):
A. If elements are in the same group, they will have the same emission spectra.
B. An emission spectrum for a single element will always have clear areas of no emitted light.
C. Electrons of an atom must be excited to produce an emission spectrum.
D. Hydrogen produces the simplest emission spectrum.
(a) is correct option.
If elements are in the same group, they will have the same emission spectra. It is False statement.
No two elements have same emission spectra
Which of the statements about properties of emission spectra is FALSE? (select only one of the...
The following properties are observed for an unknown element. Identify the element from its properties. (a) The neutral atom has two unpaired electrons. (b) One of the valence electrons in the ground-state atom has ml = +1. (c) The most common oxidation state is +4. (d) If an electron in a hydrogen atom were excited to the same principal quantum level, n, as the valence electrons in an atom of this element, and fell to the n - 1 quantum...
True statements about the absorption and emission of energy by an atom include which of the following? I. An atom can only absorb photons of light that have certain specific energies. II. An atom can emit photons of light of any energy. III. At low temperature, the lines in the absorption spectrum of an atom coincide with the lines in its emission spectrum that represent transitions to the ground state. A. I only B. III only C. I and III...
Which of the following regions of the electromagnetic spectrum has the highest frequency? Select one: A. Visible light B. Microwaves C. Infrared radiation D. Ultraviolet radiation onization energy is the energy required to add an electron to an atom in the gaseous state. Select one: True False In the Bohr model of the atom, the greatest energy would be emitted if an electron relaxed from the n = 5 orbit to which orbit? Select one: A. n = 2 B....
which of the following statements are true? a.) the uncertainty principle states that we can never know both the exact location and speed of an electron. b.) an orbital is the volume in which we are most likely to find an electron. c.) The emission spectrum of a particular element is always the same and can be used to identify the element. d.) Part of the Bohr model proposed that electrons int he hydrogen atom are located in "stationary states"...
Select true or false for each statement below. True False Electron states are described by orbits, which indicate exactly where an electron is located in an atom. True False The energy levels of all atoms except hydrogen are quantized. True False Electrons move in elliptical orbits around the nucleus of an atom. True False Atoms can gain energy by absorbing a photon. True False When atoms are in an excited state, they can release this energy by emitting light.
Which of the following statements is false? Solutions are always homogeneous mixtures. The terms "atom" and "element" can have different meanings. Elements can exist as atoms or molecules. Compounds can exist as atoms or molecules. At least two of these statements are false.
Select True or False for the following statements about electromagnetic waves. 1. The sun's radiation is most intense in the visible region. 2. X-rays can be produced in transitions involving inner electrons in an atom. 3. Gamma rays travel in vacuum at the same speed as the visible light. 4. Blue light has a longer wavelength than red. 5. Ultraviolet radiation causes common sunburn. 6. A vertical automobile antenna is sensitive to electric fields polarized horizontally. 7.Radio waves have wavelengths...
Determine if each of the statements is True or False about the resonance hybrid of PO43- [Select] 1) The central atom, P, has one lone pair electrons. 2) There are three single bonds and one double bond around the P atom in the resonance hybrid. [Select] 3) The formal charges on all terminal oxygen atoms are the same in the resonance hybrid. [Select] 4) All four resonance structures of PO43 contribute equally to the resonance hybrid of PO3- [Select ]...
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Select True or False for the following statements about electromagnetic waves. True False A vertical automobile antenna is sensitive to electric fields polarized horizontally. True False Visible light is often emitted when valence electrons change their state. True False X-rays travel in vacuum at a higher speed than the visible light. True False The sun's radiation is most intense in the infrared region. True False The Earth's atmosphere is quite transparent to infrared radiation. True False Gamma rays can be produced in transitions of an atomic...