9th Grade Science Test 10

What idea states that no two electrons in an atom can have the same four quantum numbers?

The three groups of elements are metals, semimetals, and _____________.

What is the term for a physical combination of pure substances?

What is the molality of a solution containing 15 mol of sucrose dissolved in 3.4 kg of water?

When naming the covalent molecule SeF₆, the prefix hepta- is used with fluoride.

What element has the symbol Ca?

What idea states that tiny particles do not absorb or release energy in a smooth flow?

Two atoms bonded covalently with different electronegativities is a __________ covalent bond.

Why is a sodium vapor glass tube monochromatic?

What is the organized study of the composition and interactions of matter called?

What intermolecular force occurs between all molecules?

Which element would complete the Lewis structure HNH?

If the molecules of a mixture are not completely mixed together, the substance is a homogenous mixture.

The process of combining two nuclei to form a heavier nucleus is fission.

the sum of the atomic masses of all the atoms in a molecule is called what?

The compund that contains one uranium atom and six fluorine atoms is called what?

A homogenous mixture is called a ?

What type of substance is MnO4-?

In what type of radioactive decay is an electron emitted?

What value relates the number of particles in a solution to the volume of the solution?

Calculate the formula mass of aluminum chlorate, Al(ClO3)3. (Al is 26.98 u, Cl is 35.45 u, O is 16.00 u)

Protons and neutrons are found in the nucleus.

What property describes how strongly atoms of an element pull on electrons in a chemical bond?

Oxygen's Chemical Symbol

One-way diffusion through a semipermeable membrane is called what?

Gold's chemical symbol

Atoms of the same element that have different mass numbers are what?

what unit refers to 6.022 x 10²³ particles of a substance?

What type of radioactive decay releases energy without changing the number of protons and neutrons?

Potassium's chemical symbol

What type of nuclear decay occurs when an unstable atom ejects a clump of two protons and two neutrons?

Magnesium is an alkaline earth metal, and chlorine is a halogen. The substance MgCl2 most likely has ionic bonding

Which nuclear reactor produces more fuel than it consumes?

What can raise a molecular substance's boiling point?

The electrons located in the outermost shell of any atom are called what?

In which beaker would the sugar dissolve more quickly?

Which is NOT a principle of the atomic theory?

What must be present for hydrogen bonding to occur?

What is the strongest intermolecular force?

Which of these is NOT a suspension?

An atom that has a positive electric charge because of losing electrons is called a what?

What is the only metal that is liquid at room temperature?

Calculate the molecular mass of Cl₂ Each Cl atom is 35.45 u (there are two of them in Cl₂)

Which of these is an example of an empirical formula?

The law stating that elements show regular and repeating properties when arranged by inc. atomic # is the periodic law.

A substance composed of two or more elements bonded together is a what?

In a solution, the substance that is dissolved is the solvent

What is the chemical name for the compund SCl₄?

Why did the fertilizer in the beakers on the windowsill not dissolve?

Sodium's chemical symbol

Which of these is NOT a nonpolar material

What type of intermolecular force is present between all polar molecules but not between nonpolar molecules?

what is the general term for a row of elements in the periodic table

What is the molecular mass of B₂H₆? (B: 10.81 u; H: 1.008 u)

The process of mixing molecules of one substance with those of another substance by random molecular motion is what?

a brittle texture, a dull color, poor conductivity, high reactivity, and no radioactivity fits what type of element?

What chemical bond occurs when four electrons are shared between two atoms?

What substances are composed of a single type of atom?

The time required for one half of a radioactive sample to decay into a new substance is called what?

The minimum amount of fissionable material required for a chain reaction is called what?

How many neutrons are in the element 26/12 Mg?

A mixture containing tiny suspended clumps of particles is called a what?

What is Bohr's model of the atom?