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Questions and Answers

What is the name for group 1A?

Alkali Metals

What is the name for group 2A?

Alkaline Earth Metals

What is the name for group 7A?

Halogens

What is the name for group 8A?

<p>Noble gases</p> Signup and view all the answers

What kind of ions do metals form?

<p>Cation</p> Signup and view all the answers

What kind of ions do nonmetals form?

<p>Anion</p> Signup and view all the answers

Nonmetals are located where on the periodic table?

<p>Right side</p> Signup and view all the answers

Which of the following is a molecular compound?

<p>Nitrogen monoxide</p> Signup and view all the answers

Which of the following is NOT a correct name-symbol combination?

<p>Iron, I</p> Signup and view all the answers

Identify the element that is a non-metal, a gas, and had an element symbol that starts with the letter 'A.'

<p>Ar</p> Signup and view all the answers

Which of the following statements about physical and chemical changes is FALSE?

<p>All of the above statements are true</p> Signup and view all the answers

When an atom gains an electron, the resulting particle is called:

<p>an anion</p> Signup and view all the answers

Which among the following statements is false?

<p>None of the above</p> Signup and view all the answers

Mg is a member of which family?

<p>Alkaline earth metals</p> Signup and view all the answers

What is the charge on the ion formed by aluminum?

<p>3+</p> Signup and view all the answers

If you hold a solid piece of pure gallium metal in your hand, your body heat will melt the gallium into its liquid form. This illustrates which of the following?

<p>Physical change</p> Signup and view all the answers

Carbon monoxide is considered which of the following?

<p>Molecular compound</p> Signup and view all the answers

What is the name of the compound whose formula is Na2O?

<p>Sodium oxide</p> Signup and view all the answers

The names of the elements whose symbols are Si, P, Mn, and S are respectively:

<p>Silicon, phosphorus, manganese, and sulfur.</p> Signup and view all the answers

Which of the following statements is FALSE?

<p>All of the above statements are true.</p> Signup and view all the answers

The ionic compound that forms between potassium and oxygen is:

<p>K2O</p> Signup and view all the answers

Suppose that in an ionic compound, 'M' represents a metal that could form more than one type of ion. In the formula MBr, the charge of the M ion would be:

<p>+1</p> Signup and view all the answers

When an atom loses an electron, the resulting particle is called:

<p>A cation</p> Signup and view all the answers

Which among the following elements does NOT exist as a diatomic molecule in nature?

<p>Neon</p> Signup and view all the answers

How many protons and electrons are present in O^2−?

<p>8 protons and 10 electrons</p> Signup and view all the answers

What is the name of the molecular compound SO3?

<p>Sulfur trioxide</p> Signup and view all the answers

Which of the following elements has an atomic number of 4?

<p>Be</p> Signup and view all the answers

What is the name of CoS?

<p>Cobalt(II) sulfide</p> Signup and view all the answers

Which of the following is NOT a correct name, symbol combination?

<p>Potassium, P</p> Signup and view all the answers

What is the atomic symbol for silver?

<p>Ag</p> Signup and view all the answers

The elemental symbol S represents the element ________.

<p>Sulfur</p> Signup and view all the answers

An atom containing 7 protons, 8 neutrons, and 7 electrons:

<p>Is charge-neutral</p> Signup and view all the answers

What is the formula for an ionic compound made of aluminum and oxygen?

<p>Al2O3</p> Signup and view all the answers

Which one of the following is a main-group metal element in period number 3 of the periodic table?

<p>Magnesium</p> Signup and view all the answers

How many of each type of atoms are there in the formula NH4C2H3O2?

<p>N = 4, H = 7, C = 2, O = 2</p> Signup and view all the answers

Which of the following elements has only 12 protons?

<p>Mg</p> Signup and view all the answers

Which one of the following is a main-group element?

<p>Cs</p> Signup and view all the answers

Group 8A elements are also called:

<p>Noble gases</p> Signup and view all the answers

What is an element?

<p>Whenever a substance is made of only one type of atom</p> Signup and view all the answers

When a substance is a ______, its atoms vibrate in one position -- they are not free to roam around.

<p>solid</p> Signup and view all the answers

Type of matter in which all the smallest individual pieces are the same:

<p>Pure substance</p> Signup and view all the answers

What is formed when two or more atoms are chemically joined together?

<p>Molecule</p> Signup and view all the answers

Use to indicate how many of each atom there are in a formula:

<p>Subscripts</p> Signup and view all the answers

A substance that contains different types of atoms present in the same molecule:

<p>Compound</p> Signup and view all the answers

A substance whose particles can readily slip past each other:

<p>Liquid</p> Signup and view all the answers

A substance whose particles are far apart and move very fast:

<p>Gas</p> Signup and view all the answers

A substance that contains different atoms or molecules that are physically mixed together, but not chemically bonded to each other:

<p>Mixture</p> Signup and view all the answers

Study Notes

Periodic Table Groups

  • Group 1A is known as Alkali Metals; these are highly reactive elements.
  • Group 2A is called Alkaline Earth Metals; they are less reactive compared to alkali metals.
  • Group 7A consists of Halogens, known for their high reactivity, especially with alkali metals.
  • Group 8A refers to Noble Gases, which are inert and do not readily form compounds.

Ions and Chemical Behavior

  • Metals typically form cations, positively charged ions.
  • Nonmetals typically form anions, negatively charged ions.
  • Nonmetals are predominantly located on the right side of the periodic table.

Molecular Compounds and Naming

  • Nitrogen monoxide is identified as a molecular compound among the listed options.
  • The formula Na2O is named sodium oxide.
  • Carbon monoxide is classified as a molecular compound.
  • K2O is the ionic compound formed from potassium and oxygen.

Charges and Atomic Structure

  • Aluminum forms an ion with a charge of 3+.
  • An atom that gains an electron becomes an anion.
  • An atom that loses an electron becomes a cation.
  • The ion O^2− has 8 protons and 10 electrons.

States of Matter

  • A solid has a definite shape and volume; particles vibrate but do not move freely.
  • A liquid allows particles to slip past each other; it has a definite volume but not a definite shape.
  • A gas has particles that are far apart and move rapidly.
  • Physical changes do not alter a substance's composition, whereas chemical changes do.

Elemental Symbols and Properties

  • S represents sulfur; Ag is the atomic symbol for silver.
  • Be has an atomic number of 4.
  • A substance made of one type of atom is defined as an element.

Molecules and Compounds

  • A molecule forms when two or more atoms are chemically joined together.
  • A compound contains different types of atoms bonded together.
  • Pure substances have uniform properties, while mixtures consist of multiple components that are not chemically bonded.

Miscellaneous Facts

  • Subscripts indicate the number of each type of atom in a chemical formula.
  • Nonmetals, such as neon (Ne), do not exist as diatomic molecules naturally.
  • Magnesium (Mg) has 12 protons and is considered a main-group metal.

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