9th science test 10

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

The electrons located in the outermost shell are called _____________ electrons

The bohr Model of the atom looks like what?

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

The organized study of the composition and interactions of matter is called _______________.

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

How strongly atoms of an element pull on electrons in a chemical bond is known as ______________.

What element's symbol is K?

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

in what type of decay is an electron emitted?

What term refers to the time required for one half of a radioactive sample to decay into a new substance?

A manufacturer needed to make a material with non polar molecules. Which of these meets that criteria?

A small sample of unknown substance is analyzed in a lab. it has soft texture, shiny color, high react, and conduct.

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

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

What nuclear reactor produces more fuel than it consumes?

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

What occurs when two atoms share two pairs of electrons in a covalent bond?

What intermolecular force is present between all polar molecules but not between non polar molecules?

What factor must be present for hydrogen bonding to occur?

what type of nuclear decay occurs when an atom ejects a clump of 2 protons and 2 neutrons?

4 cups have water. 2 have water at 10 and 2 have water at 90 2 are stirred. which cup would dissolve sugar faster?

What is the strongest intermolecular force?

Which of the following is not a suspension?

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

What is the formula mass of Aluminum Phosphate, AlPO₄ (O: 16 u, Al: 26.98 u, P:30.97 u)

an atom that has a positive charge is a what?

CH₂ is an example of what kind of formula?

What element has the symbol Ca?

What is the chemical name for a compound that has one uranium and six fluorine atoms?

what prefix is used for fluorine in SeF₆?

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

A homogenous mixture that consists of a solute dissolved in a solvent is a ______________.

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

What substance is composed of two or more elements bonded together?

What is the Chemical name for SCl₄?

What is the mass number of the element 26/12 Mg?

What element's symbol is Na?

What value relates the number of moles of solute per mass of solvent?

What force occurs between all molecules?

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

Which bond has the strongest intermolecular force?

what element would complete the Lewis structure H:N:H based on the octet rule?

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

When atoms with different electronegativities bond, what type of bond is formed?

What Idea states that no two electrons in an atom can have the same 4 quantum numbers?

What element's symbol is O?

elements are divided into three groups: metals, semimetals, and _________________.

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

What substances are made of a single type of atom?

Magnesium is an alkaline earth metal, and chlorine is a halogen. MgCl₂ is most likely to have ionic bonding.

Which of the following is not part of the atomic theory?

What term refers to the sum of the atomic masses of all the atoms in a molecule?

What is one-way diffusion through a semipermeable membrane called?

What element's symbol is Au?

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

atoms of the same element with different mass numbers are called what?

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

Protons and neutrons are found in the nucleus.

Why did the fertilizer in the windows completely dissolve but not the ones on the dresser?