Chemistry Midterm 21-22

1

It is defined as the discipline that studied matter as early as 400 BC. It had the purpose of finding the way to the perfect health and the transformation of materials of lesser value into the perfect metal.

1

Area of science that studies matter and the changes it can go through as well as its composition, properties and structure.

1

It is defined as knowledge acquired in a systematic way, based on careful and methodical experimentation.

1

Which of the following are pure substances?

1

A substance represented by a chemical formula is known as:

1

State of Matter is a chemical property of matter

10

Classify the following into Pure Substances and Mixtures

Pepto Bismol

Pure substance

1

A substance is made up of only one kind of atom is a (an)

1

Which of the following is a characteristic of a mixture?

1

Which of the following is a chemical change?

1

Which state of matter has a definte volume?

1

Separating a solid from a liquid by evaporating the liquid is called...

7

What is the difference between a mixture and a compound?

Scatters light
Can only be separated by chemical means
Fixed composition
Can be separated by physical means

2

A ____________________  is a change where some physical properties change but the composition remains the same.
A ____________________  occurs when the substance changes its composition completely.

What happens to matter during a chemical reaction?

1

Which of the following phase is an endothermic change?

1

Which of the following phase is an exothermic change?

1

On the sun, where temperatures are extremely high, matter exists in a state know as plasma

Required

1

Smallest particle of matter that still retains its properties is called:

1

Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago?

5

Match the item with the statement

Positively charged subatomic particle
Negatively charged subatomic particle
the central part of the atom, positively charged.
the smallest particle of an element that retains the properties of that element

4

Match each item with the correct statement.

Draggable item		Corresponding Item
mass number		total number of particles that make up the nucleus of an atom
atomic number		the weighted average of the masses of the isotopes of an element
isotope

3

Match the person to the proposed model of the atom

Draggable item		Corresponding Item
JJ Thomson		Billiard Ball Model
Ernest Rutherford		Plum pudding Model
John Dalton		Nuclear Atom

1

Werner Heisenberg stated the "uncertainty principle" that you can't know both position and velocity of a particle

5

Draggable item		Corresponding Item
electrons		horizontal row in the periodic table
periodic law		vertical column in the periodic table

group

1

Figure 5-1 shows a portion of a blank periodic table. Identify the segments labeled A and B.

1

What is another name for the representative elements?

1

What is the charge of a cation?

1

How many valence electrons does antimony have?

5

Classify the statement as a characteristic of the type of element

Required

3

The group of elements in the periodic table that is known as the alkali metals is _______ 
The noble gases are group _______ 
Of the whole periodic table, about _______  percent of elements is classified as metals.

1

How many elements are in the periodic table?

Required

1

A fictitious element X is composed of 10.0 percent of the isotope X-55, 20.0 percent of the isotope X-56, and 70.0 percent of the isotope X-57. Estimate the atomic mass of element X.

	Metals	Nonmetals
Lose valence electrons when making compounds
Have high electronegativity values
Most are solids
If solid, they're brittle
Most have low boiling points

Chemistry Midterm 21-22

It is defined as the discipline that studied matter as early as 400 BC. It had the purpose of finding the way to the perfect health and the transformation of materials of lesser value into the perfect metal.

Area of science that studies matter and the changes it can go through as well as its composition, properties and structure.

It is defined as knowledge acquired in a systematic way, based on careful and methodical experimentation.

Which of the following are pure substances?

A substance represented by a chemical formula is known as:

State of Matter is a chemical property of matter

Classify the following into Pure Substances and Mixtures

A substance is made up of only one kind of atom is a (an)

Which of the following is a characteristic of a mixture?

Which of the following is a chemical change?

Which state of matter has a definte volume?

Separating a solid from a liquid by evaporating the liquid is called...

What is the difference between a mixture and a compound?

What happens to matter during a chemical reaction?

Which of the following phase is an endothermic change?

Which of the following phase is an exothermic change?

On the sun, where temperatures are extremely high, matter exists in a state know as plasma

Smallest particle of matter that still retains its properties is called:

Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago?

Match the item with the statement

Match each item with the correct statement.

Match the person to the proposed model of the atom

Werner Heisenberg stated the "uncertainty principle" that you can't know both position and velocity of a particle

Figure 5-1 shows a portion of a blank periodic table. Identify the segments labeled A and B.

What is another name for the representative elements?

What is the charge of a cation?

How many valence electrons does antimony have?

Classify the statement as a characteristic of the type of element

How many elements are in the periodic table?

A fictitious element X is composed of 10.0 percent of the isotope X-55, 20.0 percent of the isotope X-56, and 70.0 percent of the isotope X-57. Estimate the atomic mass of element X.

It is defined as the discipline that studied matter as early as 400 BC. It had the purpose of finding the way to the perfect health and the transformation of materials of lesser value into the perfect metal.

Area of science that studies matter and the changes it can go through as well as its composition, properties and structure.

Select those that are contributions of Lavoisier

It is defined as knowledge acquired in a systematic way, based on careful and methodical experimentation.

Which of the following are pure substances?

A substance represented by a chemical formula is known as:

State of Matter is a chemical property of matter

Classify the following into Pure Substances and Mixtures

A substance is made up of only one kind of atom is a (an)

Which of the following is a characteristic of a mixture?

Which of the following is a chemical change?

Which state of matter has a definte volume?

Separating a solid from a liquid by evaporating the liquid is called...

What is the difference between a mixture and a compound?

What happens to matter during a chemical reaction?

Which of the following phase is an endothermic change?

Which of the following phase is an exothermic change?

On the sun, where temperatures are extremely high, matter exists in a state know as plasma

Smallest particle of matter that still retains its properties is called:

Which of the following was originally a tenet of Dalton's atomic theory, but had to be revised about a century ago?

Match the item with the statement

Match each item with the correct statement.

Match the person to the proposed model of the atom

Werner Heisenberg stated the "uncertainty principle" that you can't know both position and velocity of a particle

Categories of elements in the periodic table

Figure 5-1 shows a portion of a blank periodic table. Identify the segments labeled A and B.

What is another name for the representative elements?

What is the charge of a cation?

How many valence electrons does antimony have?

Classify the statement as a characteristic of the type of element

How many elements are in the periodic table?

A fictitious element X is composed of 10.0 percent of the isotope X-55, 20.0 percent of the isotope X-56, and 70.0 percent of the isotope X-57. Estimate the atomic mass of element X.