Answer:
1. Oxygen Fluoride (O with F): covalent
2. Calcium Chloride (Ca with Cl): ionic
3. Sodium with Sodium (Na with Na): neither
Explanation:
1. Oxygen Fluoride (OF2)
Oxygen with Fluorine is covalent because both of these elements are <em>nonmetals</em>. Bonds that contain only nonmetals are covalent.
2. Calcium Chloride (CaCl2)
Calcium with Chlorine is ionic because there is one <em>metal </em>and one <em>nonmetal. </em>Bonds that contain one metal and one nonmetal are ionic.
3. Sodium with Sodium
Since this is not Sodium bonding with another element, it is neither ionic or covalent.
Answer:
Fluorine
Explanation:
Data obtained from the question include:
The isotope of fluorine has:
Proton = 9
Neutron = 10
The atomic number is the proton number of the atom.
Therefore, the atomic number = 9
Mass number = proton + Neutron
Mass number = 9 + 10
Mass number = 19
Now comparing the above with the fluorine atom in the periodic table. We'll discover that the isotope is actually fluorine atom.
Therefore, the name of the isotope is fluorine
Answer:
189.5
Explanation:
its very very very very easy
The "sea of instability" refers to a region of elements on the periodic table that are highly unstable. These elements have extremely short half-lives that may be measured in micro- or nanoseconds. (A nanosecond is the time it takes for light to travel one foot.) This region of unstable elements surrounds the island of stability.
Explanation:
Distinguish chemical substances from mixtures
Key Points
Matter can be broken down into two categories: pure substances and mixtures. Pure substances are further broken down into elements and compounds. Mixtures are physically combined structures that can be separated into their original components.
A chemical substance is composed of one type of atom or molecule.
A mixture is composed of different types of atoms or molecules that are not chemically bonded.
A heterogeneous mixture is a mixture of two or more chemical substances where the various components can be visually distinguished.
A homogeneous mixture is a type of mixture in which the composition is uniform and every part of the solution has the same properties.
Various separation techniques exist in order to separate matter, including include distillation, filtration, evaporation and chromatography. Matter can be in the same phase or in two different phases for this separation to take place.
Terms
substanceA form of matter that has constant chemical composition and characteristic properties. It is composed of one type of atom or molecule.
elementA chemical substance that is made up of a particular kind of atom and cannot be broken down or transformed by a chemical reaction.
mixtureSomething that consists of diverse, non-bonded elements or molecules.
