ATOMS
ATOMS II
PERIODIC TABLE I
PERIODIC TABLE II
Chemical/Physical Properties and Changes
100

An ____________is the basic particle from which all elements are made



What is an atom

100
The number of protons is always equal to the number of ________________________
electrons
100

The vertical columns are called _________________________

groups or families

100

This element has a Group all to itself.  What element is it?

Hydrogen

100

I know that a certain element is flammable.  What type of property is this?

chemical

200

The nucleus of a atom is made up of _______________ and ____________________.

protons and neutrons

200
Explain how to calculate the number of neutrons in the nucleus of an atom.
The number of neutrons equals: atomic mass - the # of protons
200

What are most of the elements in the periodic table?

metals
200

Elements that are in the same group have similar....

chemical properties


200

The changing of water from its liquid form to gas form, is an example of what type of change?

physical

300

________________________ are neutral and have no charge.

Neutrons

300
The number of protons and the number of electrons is also equal to the _________________ number for an element on the Periodic Table.
Atomic number
300
The horizonatal rows are called ___________________
periods
300
Identify one element that has similar chemical properties to the chemical properties of boron.
gallium, indium, aluminum
300

I have a raw egg and I hard boil it.  What type of change is this?

chemical

400

The outer layer of electrons are called the ________ electrons.

What is valence

400
A substance that can not be broken down in to a simpler substance is a (an)
element
400
Atomic number is equal to the number of _______________ in the nucleus of an atom of a given element.
protons
400

What happens to the reactivity of elements as you move across the periodic table from left to right?

The reactivity decreases as you move from left to right.

400

Silver is a metal that conducts electricity.  Silver can tarnish when exposed to air and light.  The fact that it can tarnish is what type of property?

checmical

500

__________________ are found revolving around the outside of the nucleus ands have a negative charge.

Electrons

500
Explain why the overall charge of an atom is zero.
The number of positively charge protons always equals the number of negatively charges electrons.
500
Which group are the Noble Gases in?
Group 18
500

Why is H2O not found on the periodic table of elements?

Because it is a compound of 2 elements.

500

A student mixes 40 grams of baking soda with 110 grams of vinegar in a closed container.  Based on the Law of Conservation of Matter, what represents the total mass of all products after the experiment?

a) 40 grams   b) 110 grams  c) 70 grams  d) 150 grams

d) 150 grams

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