How would you describe light generated by heating pure elements if it was observed through a prism or spectroscope?
How would you describe light generated by heating pure elements if it was observed through a prism or spectroscope? You would see a series of very sharp lines of emitted light. Light is emitted as an electron transitions from a higher energy state to a lower energy state.
What does the line in the following example actually represent HH?
Answer and Explanation: H-H is an example of a covalent bond between two hydrogens (H) atoms.
Which of the following elements will most likely form an ion with a positive 1 charge?
The alkali metals (shown in yellow) always form +1 ions.
Why does an atom with many valence electrons tend to gain electrons rather than lose any?
Why does an atom with many valence electrons tend to gain electrons rather than lose any? Atoms with many valence electrons tend to have relatively strong forces of attraction between their valence electrons and the nucleus. This makes it difficult for them to lose electrons.
Which of the following experiments helped to determine that most of an atom is actually empty space except for a very small positive core?
Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
When light emitted from an excited element is passed through a prism which of the following is created?
If the light emitted from the excited atoms is viewed through a prism, then individual patterns of lines will be produced. These lines are called spectra and correspond to fingerprint wavelengths (symbol for wavelength is λ) for a specific element. Figure 4.2.
Which of the following is very reactive and can readily combine with molecules containing atoms with lone pairs?
Which of the following is very reactive and can readily combine with molecules containing atoms with lone pairs? An electron-deficient molecule will react with electron excess, namely a lone pair from some other molecule, like ammonia.
Which type of bond is formed in the following diagram?
Covalent bond is formed in the diagram.
Which of the following atoms is most likely to form an ion?
(a) Zinc is the most likely to form a +2 ion. An atom must lose or transfer its valence electrons to form an ion with a complete octet or stable…
When forming ions metals typically do which of the following?
Metals tend to lose electrons and form positively charged ions called cations. Non-metals tend to gain electrons and form negatively charged ions called anions.
Why do atoms tend to lose or gain electrons during chemical bonding?
An atom will lose or gain electrons to try and fill its outer shell. Ions = charged particles which are formed in ionic bonds. Chemical bond where electrons are shared. Each atom fills its outer energy level together, at the same time.
Why do metals tend to lose electrons to form positive ions?
In a reaction between metals and nonmetals, metals generally lose electrons to complete their octet and non-metals gain electrons to complete their octet. Metal atoms lose electrons from their outer shell when they form ions: the ions are positive, because they have more protons than electrons.
What observation led Rutherford and his coworkers to the conclusion that the atom has a massive and positively charged part?
1 Answer. Rutherford deduced that the atomic nucleus was positively charged because the alpha particles that he fired at the metal foils were positively charged, and like charges repel. Alpha particles consist of two protons and two neutrons, so they are positively charged.
What experimental evidence was provided for the nuclear model of the atom?
Rutherford’s gold foil experiment Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
What causes light to be emitted from atoms?
Light is emitted when an electron jumps from a higher orbit to a lower orbit and absorbed when it jumps from a lower to higher orbit. The energy and frequency of light emitted or absorbed is given by the difference between the two orbit energies, e.g.
What form of energy emission accompanies the return of excited electrons to the ground state?
electromagnetic radiation Electrons may become excited when a sample of matter is heated or subjected to an electrical current. The energy electrons emit when returning to the ground state is electromagnetic radiation, or EMR.
Which of the following options correctly describe the unique conditions in the Antarctic that cause the region to have a disproportionately large hole in the ozone layer?
Which of the following options correctly describe the unique conditions in the Antarctic that cause the region to have a disproportionately large hole in the ozone layer? – Winds in the area form a vortex that prevents warmer air from entering the Antarctic.
Which of the following is named using the unmodified element name and adding the word ion?
Which of the following is named using the unmodified element name and adding the word "ion"? Simple cations are named with their elemental name followed by the word "ion." For instance, the Na+ is named the sodium ion.
How the structure of the carbon atom affects the type of bonds it forms?
Each carbon atom forms four covalent bonds. Atoms of carbon can bond with each other or with atoms of other elements. The bonds may be single, double, or triple bonds. Because of carbon's ability to form so many covalent bonds, it often forms polymers.
What types of bonds do the common compounds have in their structures?
There are three primary types of bonding: ionic, covalent, and metallic.
Which of the following atoms is most likely to form an ion with a charge of 2+?
Answer and Explanation: (a) Zinc is the most likely to form a +2 ion. An atom must lose or transfer its valence electrons to form an ion with a complete octet or stable…
What is holding the atoms of a metal together in a solid?
metallic bond, force that holds atoms together in a metallic substance. Such a solid consists of closely packed atoms. In most cases, the outermost electron shell of each of the metal atoms overlaps with a large number of neighbouring atoms.
When ionic bonds are formed metallic elements tend to?
Answer and Explanation: Metal ions tend to lose electrons and form positive ions.
Why do metals tend to lose electrons and nonmetals tend to gain them?
Elements can gain or lose electrons in order to attain their nearest noble gas configuration. Formation of ions for completion of octet helps them gain stability. In a reaction between metals and nonmetals, metals generally lose electrons to complete their octet and non-metals gain electrons to complete their octet.
Why do metals lose electrons and nonmetals gain electrons in the formation of ionic compounds explain in terms of electron configurations?
Ionic bonding Metals tend to lose electrons to attain Noble Gas electron configuration. Groups 1 and 2 (the active metals) lose 1 and 2 valence electrons, respectively, because of their low Ionization energies. Non-metals are limited to the elements in the upper right hand corner of the Periodic Table.
Why atoms tend to gain or lose electrons?
Atoms and chemical species lose or gain electrons when they react in order to gain stability. Thus, typically, metals (with nearly empty outer shells) lose electrons to non-metals, thereby forming positive ions. The number of electrons depends on their position on the Periodic table (in simple terms).
Which observation led Rutherford to conclude that most of the mass of atom is concentrated at the nucleus?
Observations of Rutherford's Alpha Scattering Experiment The observations made by Rutherford led him to conclude that: A major fraction of the α-particles bombarded towards the gold sheet passed through the sheet without any deflection, and hence most of the space in an atom is empty.
What did Rutherford and his coworkers conclude from their metal foil experiments Brainly?
Rutherford concluded from his metal foil experiments that most of an atom is empty space with a tiny, dense, positively charged nucleus at the center that contains most of the mass of the atom.
What did Rutherford prove about the atom from this experiment?
Rutherford's gold foil experiment showed that the atom is mostly empty space with a tiny, dense, positively-charged nucleus. Based on these results, Rutherford proposed the nuclear model of the atom.
What discovery was accounted for in Rutherford’s model of the atom?
The gold-foil experiment showed that the atom consists of a small, massive, positively charged nucleus with the negatively charged electrons being at a great distance from the centre.