True/ false. circle the letter of any truestatement.
1. metallic properties of the elements increase fromleft to
right across a period or series.
2. the yet-to-be discovered element with an atomicnumber of
118 would be a noble gas.
3. an atom of oxygen is larger than an atom oflithium.

1. False

2. True

3. False

Explanation:

1.  Metallic properties of the elements increase from left to  right across a period or series.

Having Metallic properties means that the element is good at loosing electrons. The metallic properties decreases fro left to right across a period or series due to the decrease in radius of the atom in the periodic table.

2. The yet-to-be discovered element with an atomic number of  118 would be a noble gas.

Oganesson (Og) is the name given to this element which is a radioactive element having an atomic number of 118 and unknown melting and boiling point. It is expected to be a gas that's why it is placed in the noble gas group

3. An atom of oxygen is larger than an atom of lithium.

An atom of oxygen is smaller than an atom of lithium because oxygen has a nuclear charge of 8+ which is higher than that of lithium 3+. This higher nuclear charge means that the electrostatic attraction between electrons and nucleus is grater, which pulls the electrons closer to the nucleus resulting in a smaller radius.  

every chemical equation adheres to the law of conservation of mass, which states that matter cannot be created or destroyed. therefore, there must be the same number of atoms of each element on each side of a chemical equation.

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.