Group 1 elements are known as the

The number of protons in the nucleus of an atom of an element is the:

Malleability is the property of metal that allow it to:

Hardness, temperature, size, and color are all types of:

What is a pure substance that cannot be broken down into simpler substances by physical or chemical means?

Taylor stirs 2 grams of salt into a cup of water. He then tries to get the salt back by evaporating the water. In this experiment, the mass of salt recovered would be the same as the initial mass because:

Sandy heated 20 grams of liquid hydrogen peroxide until it was completely broken down into liquid water and oxygen gas. Which of these best describes the total mass of water and oxygen that was produced?

When magnesium (Mg) metal is burned in the presence of oxygen (O2), magnesium oxide (MgO) is produced. The properties of magnesium oxide are different than the individual properties of magnesium and oxygen because magnesium oxide is:

What do the elements sulfur (S), nitrogen (N), phosphorus (P), and bromine (Br) have in common?

Which class of elements best conducts electricity?

A student divides several cubes into two groups, based on whether or not each cube can float in water. What property is the student using to classify the cubes?

Which substance is composed of only one type of atom?

A student passes a magnet over 10 grams of a powder. Four grams of the powder stick to the magnet, while 6 grams do not. Which of these identifies the substance?

A student is testing a solid material to determine whether it is a pure substance or a mixture. Which observation would MOST likely indicate that the material is a mixture?

Elements in the same column of the periodic table of the elements all:

Where on the periodic table are you most likely to find elements that do not react with other elements?

Sodium reacts with water. Which element is most likely to have a similar effect to sodium if it is exposed to water?

A chemist observed bubbling and fizzing after adding an acid solution to a white powdery substance in a beaker. Which of the following can be inferred?

When frozen carbon dioxide is heated, it changes directly into a gas. Which statement BEST indicates that a physical change has taken place?

A student placed a small chip of limestone into a hydrochloric acid solution, and carbon dioxide gas was released. The carbon dioxide provided evidence that:

Which of the following is a correctly written chemical equation that demonstrates the conservation of mass?

How does the concept of conservation of mass apply to chemical reactions?

A chemical reaction separates water into hydrogen gas and oxygen gas. Which of the following statements is true about the mass of the water and the combined mass of the two gases?

Which of the following is a balanced equation?

Copper (Cu) reacts with oxygen (O) to form copper oxide (CuO). The properties of CuO are most likely:

What is the smallest unit of an element that still retains the element’s properties?

Scientists can identify an element by looking at the structure of a single:

Which of the following results when hydrogen and chlorine chemically bond to form hydrogen chloride?

The compound potassium sulfate, K2SO4, is composed of: