8th Science midterm

The smallest particle of an element is called a(n)____

What name is given to the elements in group 3-12

Which of the following groups contain the most reactive elements

A(n) _______ is a group of two or more atoms that are held together by chemical bonds

In the chemical formula for an ionic compound, which item is written first?

Hardness, texture, color, and freezing point are examples of ________ properties of matter

Is the candle burning a open system or closed system

______ are polymers of amino acids

The only sure evidence for a chemical reaction is ______

With some exceptions compounds that contain carbon are called _____

Mendeleev created the first periodic table by arranging elements in order of ______

A combination of an oxygen & a hydrogen atom, -HO, is called a ________

Which diagram represents fluids? How do you know?

In deciding wether to use a technology, people must analyze

Select the element from the group containing the most reactive non elements

A(n) ____ is a single kind of matter that has a specific composition

In chemical reactions, what does the principle of conservation of mass mean

State __ is a gas

Magnesium bromide is an ionic compound with the chemical formula MgBr*2. What does the “2” tell you?

What is the goal of technology

When you add too much solute that no more dissolves, you have a ______

Identifying the cause of any problem in a design is an example of

What is one way to increase the solubility of sugar in water

A hydrocarbon with only single bonds in its carbon chain is called a(n) ______ hydrocarbon

How would a solute affect the boiling point of water

The flame gave of black smoke is it a chemical or physical change

Which group contains elements with 2 valence electrons

Is a candle being lit exothermic or endothermic

What kind of properties do Metalloids tend to have?

An engineer is a ________

The atomic number of an element is based on the

In an electron dot diagram of aluminum, three dots should be drawn around the element’s symbol. Why?

If state A is heated what will it most resemble. Why?

From an element’s location in the periodic table, you can predict

The fact that matter is not created or destroyed in a chemical or physical change is called the law of conservation of _

A change that produces one or more new substances is called a _______ change

Electrons involved in bonding between atoms are called

Prototypes are used to

The result or product of a process is called a(n)

Carbon atoms can form in what 3 ways?

If a metal reacts violently with water it is in what group on the periodic table?

State __ is a liquid

State ____ is a solid. Why?

What is chemistry?

How is a solute different from a solvent?

When an atoms loses an electron, it becomes a(n)

In a water solution, how do acids differ from bases.

A substance that undergoes a ______ change is still the same substance after the change

Many ____ have pleasant fruity smells

What is a double bond?

To find the _____ of a rectangular object, you must multiply the object’s length, width, and height

The first step in designing or redesigning a product is

What does a neutralization reaction produce

How do elements in these groups tend to compare from left to right of these groups

When a candle is lit, a pool of liquid of wax in the area around the wick. Is this a chemical or physical change

A mixture in which particles can be easily seen and separated by filtering or settling

The conservation of mass is true

Most of the elements that touch forming a zigzag line in the periodic table belong to one major group. What is the group

You can find the pH of a substance by using

The ways in which people change the world around them to meet their needs or solve practice problems

Most positively charged particles passed through the foil, a few deflected strongly, this caused Rutherford to infer?