INV 2 - INV

28 important questions on INV 2 - INV

How is the spoiling of milk classified?

Chemical

How is bending wire classified?

Physical

How is the rusting of a nail classified?

Chemical
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How is salt dissolving in water classified?

Physical

What experiment is associated with Dalton?

Atoms of specific elements combine in specific, whole number ratios to form compounds.

What are Dalton's postulates?

  1. All matter is made up of atoms. They are indivisible and indestructible.
  2. All atoms of a given element are exactly identical.
  3. Atoms of different elements are different.
  4. Compounds form when two or more different types of atoms bond chemically, and they do so in fixed whole number ratios.
  5. Atoms are not destroyed during chemical reactions, they are just rearranged a bit.

What experiment is associated with Thomson?

In this experiment (Cathode ray tube), the electron was discovered when a negative particle with a mass less than an atom was attracted to the + plate.

Which aspect of Thomson's model is not still true?

Atom is not a + sphere and the electrons are not just stuck inside.

Which aspect of Chadwick's model is not still true?

Electron orbitals are now electron clouds (sublevels).

What did Mosley revise?

Mosley revised Mendeleev's PT.

What are columns in the periodic table also known as?

Columns are also known as groups and represent # of valence e's.

What are rows in the periodic table also known as?

Rows are also known as periods and represent same number of energy levels.

What are the characteristics of metals?

Metals are solids, conductive, shiny, malleable, ductile.

What are the characteristics of nonmetals?

Nonmetals are liquid, gas, not conductive, dull, brittle.

What is the name of Group 2A?

Group 2A is called alkaline earth metals.

What is the characteristic of Group B?

Group B has multivalent metals.

What is the characteristic of Group 8A?

Group 8A has 8 valence e's except He.

According to Aufbau's principle, how do electrons occupy energy states?

Electrons occupy the lowest possible energy state first before filling higher energy states.

What is the shorthand notation for the electron configuration of bromine?

[Ar] 4s² 3d¹⁰ 4p⁵

Bromine will be isoelectronic with which element?

Krypton (Kr).

What are the exceptions listed for multivalent metals?

Zn⁺², Cd⁺², Ag⁺

What allows for metallic properties such as malleability and ductility in metallic bonding?

Sea of electrons

What is the "shared pool of electrons" called in metallic bonding?

The sea of delocalized electrons

What are the diatomic elements listed in the document?

H₂, O₂, N₂, Cl₂, Br₂, I₂, F₂

What type of elements form ionic bonds?

Metal + nonmetal
metal + PAI

How strong is the bond in ionic bonding?

Very strong

Describe the brittleness or malleability of metallic bonds.

Ductile + malleable

How does the sea of electrons affect the structure in metallic bonding?

It allows the metal cations to shift in the matrix and therefore the metal bends when a force is applied.

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