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I NEEED HELP WITH A TEST
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HELPP WITH THE TEST
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Matter Interactions Unit Test somone help me with the answerrrrrs i NEED HELPPPP
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NAH UH is 100% corect
Question How does a balanced chemical equation demonstrate the Law of Conservation of Mass?(1 point) Responses it shows that all compounds remain bonded after the reaction it shows that all compounds remain bonded after the reaction it shows that no atoms
How are chemical changes different from physical changes?(1 point) Responses They form new substances. They form new substances. They are reversible. They are reversible. They include shifts in the phase of matter. They include shifts in the phase of
Question A student cuts some fabric into two pieces. Is this change physical or chemical?(1 point) Responses It is a physical change because there is no reaction. It is a physical change because there is no reaction. It is a chemical change because the
Why are sodium (Na) and potassium (K) in the same group on the periodic table?(1 point) Responses They have similar reactivity. They have similar reactivity. They are both colorless. They are both colorless. They have similar atomic weights. They have
Matter Interactions Unit Test 6 of 166 of 16 Items Question Use the periodic table to answer the question. An illustration shows the periodic table. Which element has the same number of valence electrons as bromine (Br)? (1 point) Responses krypton (Kr)
Question If a substance is made of a single element, it is(1 point) Responses made of one type of atom. made of one type of atom. made of multiple types of atoms that have chemically bonded together. made of multiple types of atoms that have chemically
Cobalt has a mass number of 59 and an atomic number of 27. A student wants to create a model of a cobalt atom. Which statement about the model is correct?(1 point) Responses The model should show 27 protons and 32 neutrons. The model should show 27 protons
Which statement about an atom is correct?(1 point) Responses The neutron has no charge and is found outside of the nucleus. The neutron has no charge and is found outside of the nucleus. The proton has no charge and is found in the nucleus. The proton has
What will make an atom without an electrical charge? (1 point) Responses An equal number of neutrons and electrons, because neutrons are positively charged and electrons are negatively charged. An equal number of neutrons and electrons, because neutrons
In a molecule of lithium sulfide, there are two atoms of lithium and one atom of sulfur. Which statement about lithium sulfide is correct?(1 point) Responses The atoms in lithium sulfide are held together by bonds. The atoms in lithium sulfide are held
