DE_CHEM_2.5_Periodic Trends

Last updated almost 3 years ago

16 questions

Pre Assessment/Background Knowledge

Required

4

Engage

Required

1

Required

1

Required

2

Required

1

Required

1

Required

1

Required

1

Explore 1

3

1

Library

DE_CHEM_2.5_Periodic Trends

Last updated almost 3 years ago

16 questions

Pre Assessment/Background Knowledge

Required

4

What do I already know about periodic trends?

Engage

Question 2

01:28

Question 3

02:20

Question 4

04:57

Required

1

Scientists have observed that atoms in families share the same _______.

Required

1

Required

2

Required

1

Using the periodic table, explain why rubidium (Rb) has higher ionization energy than cesium (Cs).

Required

1

Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number?

Required

1

Draggable item		Corresponding Item

Required

1

Explore 1

3

The reactivity of metals tends to decrease from __________ to __________ across the periodic table. The reactivity of metals also tends to increase as you move __________ within a group.

Question 13

01:26

1

As you move from left to right in the periodic table, what trend do we see in regard to the density of metals?

1

How does reactivity change as you move through the periodic table.

What do I already know about periodic trends?

Question 2

01:28

Question 3

02:20

Question 4

04:57

Scientists have observed that atoms in families share the same _______.

What is one characteristic that makes gold so valued for jewelry over metals like nickel and copper?

Gold is more pretty.

Gold is less expensive.

Gold is extremely tough.

Gold does not readily react with other elements.

Select the statements that are considered true.

An atom is the smallest unit of an element that has the properties of that element

Elements are distinguished from each other by the number of neutrons present in their nuclei.

Elements are made from several different types of atoms.

Atoms consist of a nucleus that contains a certain number of protons and neutrons.

Using the periodic table, explain why rubidium (Rb) has higher ionization energy than cesium (Cs).

Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number?

Draggable item		Corresponding Item
atomic number		found in a cloud that orbits an atom's nucleus
neutron(s)		subatomic particles that has a positive charge
electron(s)		subatomic particles that has no charge
nucleus		equal to the number of protons
proton(s)		made up of protons and neutrons

If a neutral atom of Gallium (atomic number 31) has 39 neutrons in its atomic nucleus, which of the following statements are true?

Gallium has an equivalent of 39 protons.

Gallium has 31 electrons orbiting its nucleus.

Gallium's atomic mass number is 70 amu.

Gallium's atomic mass number is 39 amu.

Gallium can be classified as a charged atom or ion.

The reactivity of metals tends to decrease from __________ to __________ across the periodic table. The reactivity of metals also tends to increase as you move __________ within a group.

Question 13

01:26

As you move from left to right in the periodic table, what trend do we see in regard to the density of metals?

How does reactivity change as you move through the periodic table.

Which element is the most reactive with water?

Lithium

Beryllium

Potassium

Calcium

What is an atom?

If you combine elements into other substances, the properties of these substances are always the same as the base elements.

True

False

Which of the following elements DO NOT have an atomic symbol that matches with the first letter of that element?

Carbon

Nitrogen

Iron

Hydrogen

What is one characteristic that makes gold so valued for jewelry over metals like nickel and copper?

Gold is more pretty.

Gold is less expensive.

Gold is extremely tough.

Gold does not readily react with other elements.

Select the statements that are considered true.

An atom is the smallest unit of an element that has the properties of that element

Elements are distinguished from each other by the number of neutrons present in their nuclei.

Elements are made from several different types of atoms.

Atoms consist of a nucleus that contains a certain number of protons and neutrons.

atomic number

found in a cloud that orbits an atom's nucleus

neutron(s)

subatomic particles that has a positive charge

electron(s)

subatomic particles that has no charge

nucleus

equal to the number of protons

proton(s)

made up of protons and neutrons

If a neutral atom of Gallium (atomic number 31) has 39 neutrons in its atomic nucleus, which of the following statements are true?

Gallium has an equivalent of 39 protons.

Gallium has 31 electrons orbiting its nucleus.

Gallium's atomic mass number is 70 amu.

Gallium's atomic mass number is 39 amu.

Gallium can be classified as a charged atom or ion.

Which element is the most reactive with water?

Lithium

Beryllium

Potassium

Calcium

If you combine elements into other substances, the properties of these substances are always the same as the base elements.

True

False

Which of the following elements DO NOT have an atomic symbol that matches with the first letter of that element?

Carbon

Nitrogen

Iron

Hydrogen

DE_CHEM_2.5_Periodic Trends

DE_CHEM_2.5_Periodic Trends

What do I already know about periodic trends?

Using the periodic table, explain why rubidium (Rb) has higher ionization energy than cesium (Cs).

Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number?

Why does the size of the atom (atomic radius) decrease as you move left to right on the periodic table?

As you move from left to right in the periodic table, what trend do we see in regard to the density of metals?

What do I already know about periodic trends?

What is an atom?

What is one characteristic that makes gold so valued for jewelry over metals like nickel and copper?

Select the statements that are considered true.

Using the periodic table, explain why rubidium (Rb) has higher ionization energy than cesium (Cs).

Using calcium’s atomic structure, as shown in the image, what is this element’s atomic number?

If a neutral atom of Gallium (atomic number 31) has 39 neutrons in its atomic nucleus, which of the following statements are true?

Why does the size of the atom (atomic radius) decrease as you move left to right on the periodic table?

As you move from left to right in the periodic table, what trend do we see in regard to the density of metals?

Which element is the most reactive with water?

What is an atom?

If you combine elements into other substances, the properties of these substances are always the same as the base elements.

Which of the following elements DO NOT have an atomic symbol that matches with the first letter of that element?