Show:
Elements vs. Compounds vs. Mixtures
Subatomic Particles
Reading an Element Square
Periodic Table – Groups & Periods
Metals vs. Nonmetals vs. Metalloids
100

This is a pure substance made of only one type of atom.

Element

100

This particle has a positive charge.

Proton

100

What does the atomic number tell you?

How many protons is in the element

100

The vertical columns on the periodic table are called ____.

Groups

100

These are shiny, good conductors of heat and electricity, and are usually malleable.

Metals

200

Water (H₂O) is an example of this.

Compound

200

This particle has no charge and is found in the nucleus.

Neutron

200

What does the chemical symbol “Na” stand for?

Sodium

200

The horizontal rows on the periodic table are called ____.

Rows

200

These are dull, brittle, and poor conductors.

Non-metals

300

Trail mix is an example of this type of matter.

Mixture (heterogeneous)

300

Which subatomic particle determines what element an atom is? Proton, neutron or electron

Proton. If we know the proton # then we know the atomic number and can find it on the periodic table of elements.

300

If an element has an atomic number of 8, how many protons does it have?

8 protons

300

Which group of elements is known as the “noble gases”?

Group 18

300

These elements have properties of both metals and nonmetals.

Metalloids

400

Which two are chemically bound, not physically—an element, compound, and/or mixture?

element/compound 

400

If an atom has 11 protons, how many electrons does it have?

11 electrons

400

How do you find the number of neutrons in an atom?

Atomic mass-atomic number= # of neutrons

400

Which group contains very reactive metals like sodium and potassium?

Group 1: Alkali Metals 

400

Give one example of a metalloid.

  • Boron (B)

  • Silicon (Si)

  • Germanium (Ge)

  • Arsenic (As)

  • Antimony (Sb)

  • Tellurium (Te)

500

Salt water is an example of this type of mixture, because it looks the same throughout.

Homogeneous Mixture

500

An atom has an atomic mass of 23 and 11 protons. How many neutrons does it have?

12 neutrons

500

The element with the symbol “K” has an atomic number of 19. How many electrons does it have?

19 electrons

500

What do elements in the same group have in common in terms of their outer (valence) electrons?

They have the same number of outer valence electrons

500

Most of the elements on the periodic table are which type: metals, nonmetals, or metalloids?

Metals