Answer: physical
Explanation: freezing and melting are physical changes.
C. alpha = nucleus of a helium atom
beta = electron
gamma = photon
I thinlk it's by radiation?......
Answer: 1. Block
2. True ( I'm unsure. He arranged it according to mass, but he is credited for the periodic table)
3. Noble gasses
4. technetium
5. Alkaline earth metals
6. Number of protons
7. False
8. Not true: generally decreases as atomic number increases within a period
9. Argon
10. Four
11. False
12. False
Explanation:
Answer:
Bases do not react with metals in the way that acids do
Explanation:
hope this helps
pls mark brainliest
