Which of these elements has the electonic configuration of
The energy absorbed or released when an electron is added to a gaseous atom is known as
Which of these elements behave partly as an alkaline metal as well as a halogen element?
Hydrogen can be obtained economically as a bi-product in the electrolysis of _____________.
One half of the distance between the nuclei of two adjacent metal atoms in a close crystal lattice is called
What was the main reason for the rejection of Newlands law of octaves?
The tendency of an atom to attract shared electron pair of bond towards itself is known as ___________.
Which of these is not a property of metallic elements?
The presence of hydrogen bond in most molecules is responsible for the following except _________.
Which of these is not an S-block element?
Which of these is not a covalent hydride?
Ammonia
Ethyne
Hydrochloric acid gas
NaH
One half of the distance between the nuclei of two atoms bonded together by a single bond is known as
When alkali metals are heated with hydrogen, they form ____________ hydrides.
Which of the following is not a D-block element?
An hybrid orbital that has greater s-character is more likely to possess ___________.
Which of the following is not true as we move down a group of S-block and P-block elements in the periodic table?
Which of these is an sp-hybridized compound?
The energy required to remove two valence electrons of a metallic atom is called __________.
In some cases these are complete questions. But this is a laundry list. We don't do complete assignments. If you will tell us what you don't understand about one or more of these perhaps we can help you through them.
1. The element with the given electron configuration can be determined by looking at the periodic table and finding the element with the corresponding number of electrons in each orbital shell.
2. The energy absorbed or released when an electron is added to a gaseous atom is known as electron affinity. This can be found by looking up the values in a reputable reference book or by using online databases.
3. The element that behaves partly as an alkaline metal as well as a halogen element is called a metalloid. Examples of metalloids include boron, silicon, germanium, arsenic, antimony, and tellurium.
4. Hydrogen can be obtained economically as a by-product in the electrolysis of water. By passing an electric current through water, the water molecules can be split into hydrogen and oxygen gas.
5. The half of the distance between the nuclei of two adjacent metal atoms in a close crystal lattice is known as the metallic radius. This information can be found in reputable reference books or online databases.
6. The main reason for the rejection of Newlands' law of octaves was that it did not account for all the known elements at the time. Newlands' attempt to classify the elements into groups of eight, similar to musical octaves, did not hold true for all the elements.
7. The tendency of an atom to attract shared electron pairs of a bond towards itself is known as electronegativity. Electronegativity values can be found in reputable reference books or online databases.
8. Properties of metallic elements include high electrical and thermal conductivity, malleability, ductility, and luster. Therefore, the property that is not associated with metallic elements would be poor electrical conductivity.
9. The presence of hydrogen bond in most molecules is responsible for various properties such as high boiling points, surface tension, and solubility in water. However, it is not responsible for the existence of covalent bonding between atoms.
10. S-block elements are those in which the outermost electron(s) occupy the s-orbital. Elements in the s-block include the alkaline metals (group 1) and alkaline earth metals (group 2). Therefore, an example of an element that is not in the s-block would be carbon from group 14.
11. A covalent hydride is a compound that consists of a hydrogen atom bonded to another atom. Among the options given, hydrochloric acid gas, HCl, is not a covalent hydride because it is a binary acid consisting of hydrogen and chlorine.
12. The half of the distance between the nuclei of two atoms bonded together by a single bond is known as the bond length. This can be determined experimentally or estimated using bond length tables found in reputable reference books or online databases.
13. When alkali metals react with hydrogen, they form ionic hydrides. The alkali metals readily donate their valence electron to form a +1 cation, while hydrogen readily accepts an electron to form a -1 anion, resulting in an ionic compound with a hydride ion (H-).
14. D-block elements, also known as transition metals, are located in the middle of the periodic table. They include elements from group 3 to 12. Therefore, an example of an element that is not in the d-block would be sulfur from group 16.
15. An sp-hybridized compound is a compound in which the central atom's orbitals are hybridized using one s orbital and one p orbital. Examples include linear molecules like BeCl2 or acetylene (C2H2).
16. The energy required to remove two valence electrons of a metallic atom is known as the second ionization energy. This energy can be found by looking up ionization energies in reputable reference books or online databases.