D. is the same in each compound that an element forms
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Answer:
B
Explanation:
You might want to pick "A sound is created" No that answer is just fine. If you listen when sitting around a campfire, you might hear the crackling of what is burning. Burning is an excellent example of a chemical change. Wood becomes ash.
The answer is a change in the state of matter. (B). That need not indicate a chemical change. In fact, most of the time, a change in matter is a physical change.
Answer: B
Technetium, with atomic number (denoted Z) 43, is the lowest-numbered element in the periodic table of which all isotopes are radioactive. The second-lightest exclusively radioactive element, promethium, has an atomic number of 61.
Answer:
A metallic bonding holds the particles of the substance together
Explanation:
<em><u>The unknown substance is a metal</u></em>:
- It is easily bent: This means it is ductile, as it is the case with a thin metallic metallic wire.
- "When the substance is placed in a n electric circuit and the switch is closed, and LED light turns on." <em>This means it easily conducts electricity</em>. Metals are good conductors.
B
Explanation:
cause carbon is less than all of them in periodic table which therefore least in the group