Question

Select all properties of NONMETALS.

Answers:
good insulators; poor conductors
brittle

Select all properties of METALS.
lustrous
malleable and ductile
good conductors of heat and electricity

Use your periodic table to find the average atomic mass of Aluminum (Al).
Answer: 26.98

Isotopes of an element have the same number of ____ and a different number of _____.
Answers: protons/neutrons

Group on the periodic table that is naturally stable and does not react with other elements.
Answer: Nobel Gases

An atom that has become charged by gaining or losing electrons.
Answer: Ion

An atom's atomic mass comes from its
Answer: Nucleus

An anion will be a ____ ion.
Answer: negative

Which elements have the most similar chemical properties?
Answer: silicon and carbon

Which are isotopes of carbon-12? Cabon 12 has 6 protons and 6 neutrons.
Answers:
6 protons and 8 neutrons
6 protons and 7 neutrons

Number of protons in an atom.
Answer: Atomic Number

If an atom has an equal number of protons and electrons it is a...
Answer: Neutral atom

Can an atom of Hydrogen have 2 protons?
Answer: No, because protons identify the atom

Which group on the Periodic Table represents the alkaline earth metals?
Answer: 2

Select all properties of METALLOIDS.
Answers:
brittle, shiny nd solid at room temperature, semiconductor

USE THE PERIODIC TABLE
How many valence electrons does Sulfur have?
Answer: 6

The total number of Protons and Neutrons.
Answer: mass number

Use your periodic table.
Calcium (Ca) ionizes and becomes a _______ cation.
Answer: +2

Use your periodic table.
Oxygen (O) forms an ion with a charge of _______.
Answer: -2

Why are halogens so reactive?
Answer: They only need one more electron

If an atom gains an electron it is a(n)
Answer: Negative ion

Check all that are chemical properties.
Answers:
reactivity, ion formation

Answer 1

good insulators; poor conductors

brittle

malleable and ductile

good conductors of heat and electricity

26.98

protons/neutrons

Nobel Gases

Ion

Nucleus

negative

silicon and carbon

6 protons and 8 neutrons

6 protons and 7 neutrons

Atomic Number

Neutral atom

No, because protons identify the atom

2

brittle, shiny nd solid at room temperature, semiconductor

6

mass number

+2

-2

They only need one more electron

Negative ion

reactivity, ion formation

all your answers were correct