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Periodic table
Periodic table
Periodic table
Periodic table
Density
100
The person who developed the first periodic table of elements.
Who is Dmitri Mendelev?
100

On the FIRST periodic table, from left to right across each row, elements are arranged by ___________.

What is increasing atomic mass?

100

The columns on the periodic table are known as _________.

What are groups/families?

100

How do you determine the atomic mass of an atom

Protons plus neutrons

100

A block of oak wood floats when it is dropped into water.  What is the woods density, relative to the water?

It is less dense

200

Elements that do not conduct electricity.

Nonmetals

200

In the modern periodic table, elements are organized by____________.

What is atomic number?

200
The atomic number is the number of _________ in an atom of an element.
What is protons?
200
In the modern periodic table, __________ increases from left to right across each period, and it also increases from top to bottom within each group.
What is atomic number?
200

What is the density of liquid water?

1.0g/mL

300

Name 3 types of elements.

What are metals, metalloids, and nonmetals?

300
From left to right across a period, each element has one more __________ than the element before it.
What is a proton?
300
_____________ in the same group have similar properties.
What are elements?
300
Elements that are good conductors of electricity.
What are metals?
300

an object has a mass of 10g, and a volume of 15mL.  What is its density?

.66g/mL

400
Elements that fall between metals and nonmetals in the periodic table.
What are metalloids?
400

Protons have a ______ charge

Neutrons have a _________ charge

Electrons have a __________ charge

Positive

Neutral

Negative

400
The electrons in the outer energy level of an atom are called ___________ electrons.
What is valence?
400
_____________ determines an element's reactivity and whether the element can conduct an electric current.
What is the number of valence electrons?
400

An object has a volume of 50mL, and a density of 3g/mL.  What is its mass?

150g

500

Group 18 elements are nonmetals called _____________.

Noble Gasses

500

The the left of the stupid staircase, you will find what type of elements

What are metals

500

Elements in the same column or group of the periodic table have the same number of ___________ in their outer energy level.

valence electrons

500

Water reacts violently with _____________, which have one valence electron.

What is alkali metals/ group 1?

500

An object has a mass of 200g, and a volume of 120mL.  What is its density, and if it were placed in water would it float or sink?  

1.66g/mL; sink