I have been working on my homework for science for a while now and I just wanted to see if I got any questions wrong. Can someone help me by checking what problems i got wrong. My parent told me that I have at least 5 problems wrong. Can someone point them out for me and help me with them please :-)
1.
Match the key terms or concepts with the most appropriate definition or description.chemistry chemical change physical change energy
A. Elements are
B. Molecules in a gas are
C. A gas has
D. The electrons form
E. Atoms are
F. A solid has
G. Molecules in a liquid are
H. An element's atomic number is
I. Elements make up
J. A liquid has
K. Protons and neutrons make up
L. Plasma is
M. Compounds are
N. Atoms and molecules in a solid are
O. A molecule is
P. An element cannot be
Q. A compound is
(O)(generally) the smallest particle of a compound that has all the chemical properties of that compound
(L) highly ionized gas containing ions and electrons
(K) the nucleus of an atom
(N) made up of electons, protons, and neutrons
(Q) a chemical substance of two or more different elements
(F) definite volume and definite shape
(I) all matter
(H) determined by the number of protons in its nucleus
(A) broken down into different kinds of matter
(J) definite volume but no definite shape
(E)the much larger electron cloud surrounding the nucleus
(M)close together, have a fixed spatial ordering, move slightly
(B) widely separated, move around freely, and move at high speeds
(G) loosely connected to each other and can move around slowly
(C) no definite shape or volume
(D) identified by their atomic number
(P) usually expressed by a chemical formula
Ummm...... I hope u got them all right!!
Sure! I can help you with that. Let's go through each key term or concept and check if the match is correct.
A. Elements are (A) broken down into different kinds of matter
This is incorrect. Elements are not broken down into different kinds of matter. Elements are pure substances that cannot be broken down into simpler substances by chemical means. The correct match should be "identified by their atomic number" (D).
B. Molecules in a gas are (B) widely separated, move around freely, and move at high speeds
This is correct. Molecules in a gas have a lot of space between them and move around randomly at high speeds. The match is correct.
C. A gas has (C) no definite shape or volume
This is correct. Gases do not have a definite shape or volume and tend to expand to fill their container. The match is correct.
D. The electrons form (E) the much larger electron cloud surrounding the nucleus
This is incorrect. The electrons do not form the electron cloud surrounding the nucleus. The correct match should be "the nucleus of an atom" (K), as protons and neutrons make up the nucleus of an atom.
E. Atoms are (N) made up of electrons, protons, and neutrons
This is correct. Atoms are the smallest particles of an element and are composed of electrons, protons, and neutrons. The match is correct.
F. A solid has (F) definite volume and definite shape
This is correct. Solids have a definite shape and volume because their particles are closely packed together. The match is correct.
G. Molecules in a liquid are (G) loosely connected to each other and can move around slowly
This is correct. Molecules in a liquid are close together but not as tightly packed as in solids, allowing them to move around slowly. The match is correct.
H. An element's atomic number is (H) determined by the number of protons in its nucleus
This is correct. An element's atomic number represents the number of protons in its nucleus, and it uniquely identifies the element. The match is correct.
I. Elements make up (I) all matter
This is correct. Elements are the fundamental building blocks of matter, and all matter is composed of one or more elements. The match is correct.
J. A liquid has (J) definite volume but no definite shape
This is correct. Liquids have a definite volume but take the shape of their container because their particles can move more freely than in solids. The match is correct.
K. Protons and neutrons make up (K) the nucleus of an atom
This is correct. Protons and neutrons are the particles that make up the nucleus of an atom. The match is correct.
L. Plasma is (L) highly ionized gas containing ions and electrons
This is correct. Plasma is a state of matter that consists of highly ionized gas, meaning it contains charged particles (ions and electrons). The match is correct.
M. Compounds are (Q) a chemical substance of two or more different elements
This is correct. Compounds are substances made up of two or more different elements chemically bonded together. The match is correct.
N. Atoms and molecules in a solid are (M) close together, have a fixed spatial ordering, move slightly
This is correct. Atoms and molecules in a solid are closely packed together in a fixed spatial arrangement, and they vibrate or move slightly within their positions. The match is correct.
O. A molecule is (O) generally the smallest particle of a compound that has all the chemical properties of that compound
This is incorrect. While a molecule can be the smallest particle of a compound, it does not necessarily have all the chemical properties of that compound. The correct match should be "usually expressed by a chemical formula" (P), as compounds are often represented by chemical formulas.
P. An element cannot be (P) usually expressed by a chemical formula
This is incorrect. An element is not usually expressed by a chemical formula. The correct match for this statement should be "generally the smallest particle of a compound that has all the chemical properties of that compound" (O).
Q. A compound is (A) broken down into different kinds of matter
This is incorrect. A compound is not broken down into different kinds of matter. The correct match for this statement should be "a chemical substance of two or more different elements" (M).
Based on our analysis, the incorrect matches are:
A. Elements are (A) broken down into different kinds of matter (should be D. identified by their atomic number)
D. The electrons form (E) the much larger electron cloud surrounding the nucleus (should be K. the nucleus of an atom)
O. A molecule is (P) usually expressed by a chemical formula (should be O. generally the smallest particle of a compound that has all the chemical properties of that compound)
P. An element cannot be (P) usually expressed by a chemical formula (should be A. broken down into different kinds of matter)
I hope this helps you identify the incorrect matches and correct them. Let me know if you have any further questions!