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No.

Everything has mass.

Atoms have mass, Everything has atoms. :)

Atomic Mass Number for example.

:)

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Wiki User

15y ago
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AnswerBot

4mo ago

All known forms of matter have mass, which is a fundamental property that determines how they interact with gravity. However, massless particles such as photons (light) exist, but they still carry energy and momentum despite not having mass.

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Wiki User

11y ago

All observation and all theory so far indicate that they do.

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Q: Is it true that not all kinds of matter have mass?
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